A sharp, pointed part or organ, especially a sharp terminal point, as of a leaf or shell.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "mucro" in a sentence
"Mesosternal cavity: in Elateridae, the opening into which the prosternal spine or mucro is fitted."
"The _second glume_ is hyaline, about one and half times as long as the first, oblong elliptic, minutely 2-lobed at the apex, with a minute mucro between, 1-nerved with a scabrid keel."
"The _fourth glume_ has no mucro or awn and has three stamens."