Definition

Adjective 1. Having an abnormally small head and underdeveloped brain: This term describes a physical condition, typically congenital, characterized by a significantly smaller than average head circumference, which is often associated with incomplete brain development. 2. Pertaining to or affected by microcephaly: Used in medical and biological contexts to describe an individual or specimen exhibiting the features of microcephaly.

Usage Examples

• Adjective:
  • The pediatrician noted the microcephalous features in the newborn during the initial examination.
  • The condition was described as microcephalous, requiring specialized neurological care.

Advanced Usage

• Technical/Medical Context: The term is primarily used in clinical, diagnostic, and academic writing. It is a formal adjective derived from the noun "microcephaly."
  • The study focused on the genetic markers associated with microcephalous phenotypes.

Variants and Related Words

• Microcephaly (noun): The medical condition of having an abnormally small head.
  • Microcephaly can be caused by various genetic and environmental factors.
• Microcephalic (adjective): A synonym for microcephalous, used interchangeably.
  • The report documented a microcephalic infant.

Synonyms

• Nanocephalic: Having a very small head (a more specific or extreme term, often found in technical literature).
• Small-headed: A non-technical, descriptive term.

Antonyms

• Macrocephalic: Having an abnormally large head.
• Normocephalic: Having a head of normal size and proportions.

Adjective

1. having an abnormally small head and underdeveloped brain
   • a nanocephalic dwarf