adjective Botany, Zoology.
having three ribs, costae, or raised lines.
Origin of tricostate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
biology having three ribs or riblike partstricostate leaves
Word Origin for tricostate
C19: from tri- + costate
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