The body or the head of a comet.

An incipient ovule of soft cellular tissue.

A whole seed, as contained within the seed coats.

A body, usually spheroidal, in a cell or a protozoan,
distinguished from the surrounding protoplasm by a difference in
refrangibility and in behavior towards chemical reagents. It is more or
less protoplasmic, and consists of a clear fluid (achromatin) through
which extends a network of fibers (chromatin) in which may be suspended
a second rounded body, the nucleolus (see Nucleoplasm). See Cell
division, under Division.

The tip, or earliest part, of a univalve or bivalve shell.

The central part around which additional growths are
added, as of an operculum.

A visceral mass, containing the stomach and other organs,
in Tunicata and some mollusks.