Dictionary.com
Thesaurus.com

spinneret

American  
[spin-uh-ret, spin-uh-ret] / ˈspɪn əˌrɛt, ˌspɪn əˈrɛt /

noun

  1. an organ or part by means of which a spider, insect larva, or the like spins a silky thread for its web or cocoon.

  2. a metal plate or cup with tiny holes through which a chemical solution is extruded to form continuous filaments, as of rayon, nylon, or polyester.


spinneret British  
/ ˈspɪnəˌrɛt /

noun

  1. any of several organs in spiders and certain insects through which silk threads are exuded

  2. a finely perforated dispenser through which a viscous liquid is extruded in the production of synthetic fibres

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

spinneret Scientific  
/ spĭn′ə-rĕt /
  1. One of the small openings in the back part of a spider or silk-producing insect larva, through which the sticky fluid that dries into silk is released.


Etymology

Origin of spinneret

First recorded in 1820–30; spinner + -et