spinneret Syllabification: (spin·ner·et)Pronunciation: /ˌspinəˈret/Definition of spinneret noun Zoology any of a number of different organs through which the silk, gossamer, or thread of spiders, silkworms, and certain other insects is produced. (in the production of man-made fibers) a cap or plate with a number of small holes through which a fiber-forming solution is forced. spinneret in other Oxford dictionaries Definition of spinneret in the British & World English dictionary