skull·cap (sk?l?k?p?)n.1. a. A light, close-fitting, brimless cap.b. A yarmulke.2. Any of various plants of the genus Scutellaria of the mint family, having clusters of two-lipped flowers.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.skullcap (?sk?l?kæp) n1. (Clothing & Fashion) a rounded brimless hat fitting the crown of the head2. (Zoology) the nontechnical name for calvaria3. (Plants) any of various perennial plants of the genus Scutellaria, esp S. galericulata, that typically have helmet-shaped flowers: family Lamiaceae (labiates)Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014skull?cap (?sk?l?kæp) n. 1. a small, brimless, close-fitting cap, often made of silk or velvet, worn on the crown of the head. 2. yarmulke. 3. the domelike roof of the skull. 4. any of various plants belonging to the genus Scutellaria, of the mint family, having a calyx resembling a helmet. [1675?85] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.