spinneret
noun
spin·ner·et
ˌspi-nə-ˈret
1
: an organ (as of a spider or caterpillar) for producing threads of silk from the secretion of silk glands
2
or spinnerette
: a small metal plate, thimble, or cap with fine holes through which a chemical solution (as of cellulose) is forced in the spinning of man-made filaments (as of rayon or nylon)
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Merriam-Webster unabridged
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