PE1.1-3 | Normal Growth and Development — Glossary

Measurement of the physical dimensions of the human body; in paediatrics, includes weight, length/height, head circumference, MUAC, and skin-fold thickness for nutritional and growth assessment.

Body mass index (weight/height²) plotted against age-specific and sex-specific reference curves; used from 2 years for identifying overweight and obesity in children and adolescents.

Accelerated growth velocity following removal of a growth-limiting factor; requires both correction of the limiting factor and adequate nutritional support to be complete.

The direction of neurological maturation from head to toe; explains why head control precedes trunk control, which precedes standing and walking.

A normal variant in which the tempo of growth and puberty is slower than average, often familial; the child achieves normal adult height but later than peers.

For preterm infants: chronological age minus weeks of prematurity; used for developmental assessment up to 24 months to account for the neurological immaturity at birth.

A time window of heightened neuroplasticity during which specific developmental processes require appropriate input; disruption during this period causes deficits that are difficult to reverse.

Standardised developmental screening tool for children birth to 6 years assessing four domains; widely used globally with adapted Indian versions available.

Qualitative increase in the complexity and functional capacity of the organism, assessed by milestone attainment; not measured in physical units.

Failure to achieve expected developmental milestones at the appropriate age; may be global (≥2 domains) or specific (one domain). Distinct from developmental regression.

A functional skill that the majority of children of a given age can perform; used as a reference point for assessing whether development is age-appropriate.

Loss of previously acquired developmental skills; always pathological; indicates active neurological deterioration and requires urgent specialist evaluation.

Cumulative size at a single point in time (e.g. weight of 8 kg at 12 months); reflects total growth achieved to date.

Indian standardised developmental screening and assessment tool by Bharat Kapila; covers birth to 15 years; provides a developmental quotient.

Acquisition of hand-eye coordination and object manipulation skills (reaching, grasping, pincer, drawing); follows proximodistal maturation sequence.

The head position used during anthropometric length/height measurement: a horizontal line connecting the outer corner of the eye and the upper margin of the ear canal, ensuring the head is neither tilted up nor down.

Significant delay in two or more developmental domains in a child under 5 years; requires comprehensive aetiological evaluation and early intervention referral.

Acquisition of postural control and locomotion skills (head control, sitting, standing, walking, running); follows cephalocaudal maturation sequence.

Quantitative increase in physical dimensions (weight, length/height, head circumference); distinct from development, which is qualitative acquisition of functional skills.

Sustained downward crossing of two or more major percentile lines on a growth chart, or anthropometric measurements below −2 SD; a clinical sign requiring systematic aetiological evaluation.

Anterior pituitary peptide hormone that stimulates the liver to produce IGF-1; the dominant driver of postnatal linear growth.

Rate of change in a growth parameter (e.g. g/month or cm/year) over a defined interval; more sensitive for detecting growth problems than a single attained measurement.

Standard formula for calculating maintenance fluid requirements in children: 100 mL/kg/day for the first 10 kg, 50 mL/kg/day for the next 10 kg, and 20 mL/kg/day for each additional kg.

Indian Academy of Pediatrics 2015 Growth Charts for height, weight, and BMI for Indian children aged 5–18 years; the current recommended reference for this age group in India.

India's flagship government programme for child nutrition and development; includes monthly Anganwadi-level growth monitoring of all children under 6 years.

Hepatic peptide produced in response to GH; acts on growth-plate chondrocytes to stimulate linear bone growth and on muscle for protein synthesis.

Integrated Management of Neonatal and Childhood Illness; an integrated approach to child health at the health-facility and community level, covering growth monitoring, nutrition assessment, and illness management for children under 5.

Measuring board used to obtain recumbent length in children under 2 years; requires two measurers for accurate technique.

Form of severe malnutrition characterised by bilateral pedal oedema, skin changes, and hair changes, caused primarily by protein deficiency; classified as SAM regardless of MUAC or weight-for-height.

Acquisition of receptive (understanding) and expressive (speaking) communication; the most sensitive early marker of cognitive development; hearing loss is the most common remediable cause of language delay.

Defined by weight-for-height −3 to −2 SD, or MUAC 11.5–12.5 cm, in the absence of oedema; managed with supplementary feeding and close monitoring.

The process by which tissues and organs progressively acquire their full adult functional capacity; may parallel or follow physical growth.

Estimate of a child's genetic height potential, calculated as (father's height + mother's height)/2 ± 6.5 cm (+ for boys, − for girls).

Circumference of the left upper arm at the midpoint between acromion and olecranon; <11.5 cm = SAM, 11.5–12.5 cm = MAM in children 6–59 months; primary rapid screening tool in community settings.

The brain's capacity to reorganise its structure, function, and connections in response to experience; greatest in the first 3 years of life; the scientific basis for the effectiveness of early intervention.

India's large-scale household survey providing data on nutrition, health, and demographic indicators; NFHS-5 (2019–21) reports ~35% stunting in children under 5.

Facility-based centre in India for inpatient or day-care management of children with SAM; provides therapeutic feeding (F-75, F-100 or RUTF), medical management of complications, and caregiver counselling.

Acquisition of social responsiveness, emotional regulation, and self-care skills; includes social smile, stranger anxiety, parallel and cooperative play, and independence in activities of daily living.

Precise index finger–thumb opposition used to pick up small objects; expected at approximately 9–10 months; a milestone of fine motor maturation reflecting myelination of distal hand control.

National Nutrition Mission (India, 2018); aims to reduce stunting in under-5s by 2% per year and anaemia by 3% per year through convergent nutrition-sensitive and nutrition-specific interventions.

A prescriptive standard (WHO 2006 MGRS) describes how children should grow under optimal conditions; a descriptive standard describes how a specific population actually grows. Prescriptive standards are preferred for malnutrition diagnosis as they are not lowered by population-level undernutrition.

The direction of neurological maturation from body axis outward to the extremities; explains why shoulder control (reaching) precedes finger control (pincer grasp).

Reversible growth failure caused by severe psychosocial deprivation or abuse, mediated by cortisol-induced functional GH suppression; resolves when the child is placed in a nurturing environment.

India's national child health screening programme covering 4 Ds: Defects at birth, Deficiencies, Diseases, and Developmental delays/disabilities in children 0–18 years.

Defined by weight-for-height below −3 SD, MUAC <11.5 cm (children 6–59 months), or bilateral pedal oedema; requires intensive therapeutic feeding.

Number of standard deviations a measurement falls above or below the reference median; preferred over percentiles for detecting malnutrition at the extremes of the distribution.

Gradual increase in mean adult height across successive generations in a population, predominantly attributable to improving nutrition and socioeconomic conditions rather than genetic change.

The infant's first voluntary facial expression of pleasure in response to a human face; expected at 6–8 weeks of age; absence beyond 3 months is a developmental red flag.

Height board used to measure standing height in children ≥2 years; the child stands erect with heels, buttocks, shoulder blades, and occiput against the vertical board.

Height-for-age below −2 SD from the mean on WHO/IAP standards; reflects chronic cumulative growth failure due to sustained nutritional or health deprivation.

17-item developmental screening tool validated on South Indian children aged 0–2 years; designed for community health worker use.

Produced by the thyroid gland; permissive for GH secretion and essential for GH receptor expression at the growth plate and for normal neuronal maturation in infancy.

Weight-for-age below −2 SD; a composite index that may reflect wasting, stunting, or both; less specific than weight-for-height for current malnutrition.

Weight-for-height below −2 SD; reflects acute nutritional deficit or illness causing recent weight loss relative to height.

The WHO Multicentre Growth Reference Study; prescriptive international growth standard for children birth to 5 years, derived from exclusively breastfed healthy infants across six countries including India.