Nanocephalic

Part of speech: adjective

Definitions

1. Having an abnormally small head, a condition often associated with certain developmental disorders or brain abnormalities
2. Describing a person or animal whose skull is unusually small in proportion to the body, often as a result of medical conditions
3. Characterized by a head that is far smaller than normal for its age or species, typically from an inherited or developmental cause

Etymology: "Nanocephalic" is built from two Greek-derived parts. The prefix "nano-" comes from the Greek "nanos", meaning "dwarf", and it reached English as a prefix meaning "one-billionth" only in modern scientific use, so here it carries its older sense of smallness. The second part, "-cephalic", comes from the Greek "kephalē", meaning "head", and appears in many anatomical and medical terms describing the shape or size of the skull. Put together, the word describes a person or animal with an abnormally small head. It is a technical coinage from classical roots, formed in the same way as scientific terms that pair a Greek prefix with a Greek combining form, so it reflects the vocabulary of medicine rather than any ancient usage.

Synonyms: microcephalic

Antonyms: macrocephalic