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Webster's 1913 Dictionary

COARCTATE

Co *arc "tate, a. Etym: [L. coarctatus, p. p. of coarctare to press together; co- + arctare to press together, from arctus, p. p. See Arctation. ] (Zoöl.)

Defn: 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.

New American Oxford Dictionary

coarctate

co arc tate |kōˈärkˌtāt koʊˈɑrkteɪt | ▶adjective chiefly Anatomy & Biology pressed close together; contracted; confined. • Entomology (of the pupa of certain flies ) formed within and remaining concealed by the larval cuticle or puparium. ORIGIN late Middle English: from Latin coarctatus, past participle of coarctare ‘press or draw together. ’

Oxford Dictionary

coarctate

coarctate |kəʊˈɑːkteɪt | ▶adjective chiefly Anatomy & Biology pressed close together; contracted; compressed. • Entomology (of the pupa of certain flies ) formed within and remaining concealed by the larval cuticle or puparium. ORIGIN late Middle English: from Latin coarctatus, past participle of coarctare ‘press or draw together ’.