embryo sac

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noun Botany.

the megaspore of a seed-bearing plant, situated within the ovule, giving rise to the endosperm and forming the egg cell or nucleus from which the embryo plant develops after fertilization.

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Origin of embryo sac

First recorded in 1870–75

Words nearby embryo sac

embryonization, embryonoid, embryony, embryopathy, embryoplastic, embryo sac, embryotomy, embryotoxic, embryotoxicity, embryotoxon, embryo transfer

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for embryo sac

Surrounded by inert goods, we felt hemmed in, pushed toward a lifestyle cul-de-sac.
How Young People Are Destroying Liberty|James Poulos|October 11, 2014|DAILY BEAST
Three years later Sophia goes back to the clinic, where they repeat the IVF process and transfer a single normal female embryo.
‘Designer’ Babies Are Only for the Rich|Jean Twenge|July 7, 2014|DAILY BEAST
Almost all 35 to 39-year-old women—92 percent—had at least one normal embryo to transfer after a single IVF cycle.
The Crumbling Post-35 Pregnancy Myth|Jean Twenge|June 29, 2014|DAILY BEAST
It is this uncertainty that drives many religious objectors: they protest if there is any chance an embryo could be harmed.
Why Can’t the FDA Fix Outdated Birth Control Labels?|Tiffany Stanley|March 22, 2014|DAILY BEAST

The intelligence, surveillance and reconnaissance role was in the embryo stage.
America Doesn’t Need a Big Army Any More|Bill Sweetman|March 10, 2014|DAILY BEAST
The embryo can be located by the commotion which its active motion produces among the corpuscles.
A Manual of Clinical Diagnosis|James Campbell Todd
They are asymmetrically oval, about 50 in length, and often contain a partially developed embryo.
A Manual of Clinical Diagnosis|James Campbell Todd
And, lastly, that at the apex of the nucleus the radicle of the future Embryo would constantly be found.
Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]|Phillip Parker King
On these grounds my opinion respecting the Embryo of Cephalotus was formed.
Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]|Phillip Parker King
In such cases the external umbilicus alone affords a certain indication of the position of the future embryo.
Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]|Phillip Parker King

British Dictionary definitions for embryo sac

embryo sac

noun

the structure within a plant ovule that contains the egg cell: develops from the megaspore and contains the embryo plant and endosperm after fertilization

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

Scientific definitions for embryo sac

embryo sac

An oval structure within an ovule of an angiosperm that contains the egg. Together with the fertilized egg, it develops into a seed. The embryo sac is the female gametophyte of angiosperms, consisting of eight nuclei: the egg and two adjacent and short-lived synergids that are near the micropyle (the opening where the pollen nuclei will enter), two central nuclei (which will combine with one of the pollen nuclei to form the endosperm), and three antipodal nuclei at the end of the embryo sac opposite the micropyle. Like the synergids, these nuclei degenerate at or shortly after fertilization. See more at gametophyte pollination.

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embryo sac

noun Botany.

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Origin of embryo sac

Words nearby embryo sac

Example sentences from the Web for embryo sac

British Dictionary definitions for embryo sac

noun

Scientific definitions for embryo sac