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cicatricle

British  
/ ˈsɪkəˌtrɪkəl /

noun

  1. zoology the blastoderm in the egg of a bird

  2. biology any small scar or mark

"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

Etymology

Origin of cicatricle

C17: from Latin cicātrīcula a little scar, from cicatrix