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