constrictor

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constrictor

1. any of various nonvenomous snakes, such as the pythons, boas, and anaconda, that coil around and squeeze their prey to kill it
2. Anatomy any muscle that constricts or narrows a canal or passage; sphincter
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

constrictor

[kən′strik·tər]
(aerospace engineering)
The exit portion of the combustion chamber in some designs of ramjets, where there is a narrowing of the tube at the exhaust.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
CC, cucullaris; CHD, constrictor hyoideus dorsalis; DR-SUPC, dorsal superficial branchial constrictor muscles; EP, epiaxialis; EPE, ethmoideo-parethmoidalis; HYM, hyomandibula; LH, levator hyomadibularis; N, neurocranium; QM comp, anterior/posterior quadratomandibularis complex; SYN, synarcual.
The intrinsic muscles are formed of a pair of dilator muscles and a pair of constrictor muscles. The external laryngeal muscles appear for the first time in reptiles.
Dysphagia is thought to be caused by toxin diffusion into the constrictor muscles. Toxin diffusion has been shown to be dose-related.