Co·arct Co·arc·tate, v. t.
1. To press together; to crowd; to straiten; to confine closely. [Obs.]
2. To restrain; to confine. [Obs.]
Co·arc·tate a. Zool. Pressed together; closely connected; -- applied to insects having the abdomen separated from the thorax only by a constriction.
Coarctate pupa Zool., a pupa closely covered by the old larval skin, as in most Diptera.
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coarctate
adj : (of an insect pupa) enclosed in a rigid case