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accessorius

[ak-suh-sawr-ee-uh s, -sohr-]
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noun, plural ac·ces·so·ri·i [ak-suh-sawr-ee-ahy, -sohr-] /ˌæk səˈsɔr iˌaɪ, -ˈsoʊr-/.
  1. Anatomy. any muscle, nerve, gland, etc., that reinforces the action of another.
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Origin of accessorius

< New Latin, Medieval Latin: accessory
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for accessorius

accessorius

noun
  1. anatomy a muscle or nerve that has an augmenting action
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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