n. In entomology: A South American genus of caraboid beetles, with about 6 species, having securiform terminal joints of both maxillary and labial palpin. A genus of nemocerous dipterous insects of the family Chironomidæ.n. A genus of reptiles.n. [lowercase] In pathology: A microcephalic personn. Microcephaly.n. [lowercase] In teratology, a monster with a small, imperfect head or cranium.