macrosporangium
Americannoun
noun
Other Word Forms
Noun Inflected Forms
Etymology
Origin of macrosporangium
First recorded in 1870–75; macro- + sporangium
Example Sentences
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Secondly, the nucleus of the ovule corresponds with the macrosporangium of Selaginella, through the connecting link of the conifers, where the ovule is of similar origin and position to the macrosporangium of the Lycopodiaceæ.
From Scientific American Supplement, No. 531, March 6, 1886 by Various
C, longitudinal section of a spike, with a single macrosporangium at the base; the others, microsporangia, × 3.
From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Campbell, Douglas Houghton
The spores are of two kinds, as in Selaginella, but the macrosporangia contain numerous macrospores.
From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Campbell, Douglas Houghton
In the seed plants the macrosporangia remain attached to the parent plant, in nearly all cases, until the archegonia are fertilized and the embryo plant formed.
From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Campbell, Douglas Houghton
The macrosporangia are also ordinarily known as “ovules,” a name given before it was known that these were the same as the macrosporangia of the higher pteridophytes.
From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Campbell, Douglas Houghton
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
