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Unicamerate, ū-ni-kam′e-rāt, adj. having one chamber or loculus, unilocular.

Unilocular, ū-ni-lok′ū-lar, adj. having but one loculus or cavity, as the heart of an amphioxus.

In function the perianth may be compared with a unilocular ovary containing a single ovule; the projecting integument, which at the time of pollination secretes a drop of liquid, serves the same purpose as the style and stigma of an angiosperm.

Cysts may be simple, unilocular or multilocular, and may attain an enormous size.

The largest class are the unilocular, or simple, external galls, divided by Lacaze-Duthiers into those with and those without a superficial protective layer or rind, and composed of hard, or spongy, or cellular tissue.