Co*arc"tate (?), a. [L. coarctatus, p. p. of coarctare to press together; co- + arctare to press together, from arctus, p. p. See Arctation.] (Zo÷l.) Pressed together; closely connected; -- applied to insects having the abdomen separated from the thorax only by a constriction.
Coarctate pupa (Zo÷l.), a pupa closely covered by the old larval skin, as in most Diptera.
Co`arc*ta"tion (?), n. [L. coarctatio.] 1. Confinement to a narrow space. [Obs.] Bacon.