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tricostate

[trahy-kos-teyt, -kaw-steyt]
adjective Botany, Zoology.
  1. having three ribs, costae, or raised lines.
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Origin of tricostate

First recorded in 1860–65; tri- + costate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for tricostate

tricostate

adjective
  1. biology having three ribs or riblike partstricostate leaves
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Word Origin

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