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 "macrospore" in a sentence
"The nucellus is a cellular tissue enveloping one large cell, the embryo-sac or macrospore."
"_Casuarina_ and others, instead of a single macrospore a more or less extensive sporogenous tissue is formed, but only one cell proceeds to the formation of a functional female cell."
"The germination of the macrospore consists in the repeated division of its nucleus to form two groups of four, one group at each end of the embryo-sac."