divaricator

British

/ daɪˈværɪˌkeɪtə /

noun

zoology a muscle in brachiopods that controls the opening of the shell

"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

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divaricator

Interior of dorsal valve. c, c’, cardinal process; b’, b’, hinge-plate; s, dental sockets; l, loop; q, crura; a, a’, adductor impressions; c, accessory divaricator; b, peduncle muscles; ss, septum.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" by Various

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023