hippocampus

hippocampus is defined in Webster's Unabridged Dictionary (1913) with 2 senses. The full text of each entry is reproduced verbatim below.

Definitions

1.(Zoöl.) A genus of lophobranch fishes of several species in which the head and neck have some resemblance to those of a horse; -- called also sea horse. Note: They swim slowly, in an erect position, and often cling to seaweeds by means of the incurved prehensile tail. The male has a ventral pouch, in which it carries the eggs till hatched.
2.(Zoöl.) A name applied to either of two ridges of white matter in each lateral ventricle of the brain. The larger is called hippocampus major or simply hippocampus. The smaller, hippocampus minor, is called also ergot and calcar.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

Definitions: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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