Co‐arc″tate (?), a. [L. coarctatus, p. p. of coarctare to press together; co- + arctare to press together, from arctus, p. p. See Arctation.] (Zoöl.) Pressed together; closely connected; — applied to insects having the abdomen separated from the thorax only by a constriction.
Coarctate pupa(Zoöl.), a pupa closely covered by the old larval skin, as in most Diptera.