megasporangium

American  

[meg-uh-spaw-ran-jee-uhm, -spoh-] / ˌmɛg ə spɔˈræn dʒi əm, -spoʊ- /

noun

Botany.

• megasporangia
  plural

1. a sporangium containing megaspores.

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megasporangium British  

/ ˌmɛɡəspɔːˈrændʒɪəm /

noun

1. the structure in certain spore-bearing plants in which the megaspores are formed: corresponds to the ovule in seed plants Compare microsporangium

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megasporangium Scientific  

/ mĕg′ə-spə-răn′jē-əm /

• megasporangia
  plural

1. A plant structure in which megaspores are formed, such as those of the female cones of pines.

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Other Word Forms

Noun Inflected Forms

• megasporangia
  plural

Etymology

Origin of megasporangium

First recorded in 1885–90; mega- + sporangium

Example Sentences

See Examples For:

megasporangium megasporangia

In the female cone, megaspore mother cells are present in the megasporangium.

From Textbooks ● Jan. 1, 2015

The integuments, while protecting the megasporangium, do not enclose it completely, but leave an opening called the micropyle.

From Textbooks ● Jan. 1, 2015

The microsporophyte has a cluster of cells called a microsporangium, and the megasporophyte has a cluster of cells called a megasporangium.

From Textbooks ● Jan. 1, 2015

The layer of sporophyte tissue that surrounds the megasporangium, and later, the embryo, is called the integument.

From Textbooks ● Jan. 1, 2015

A double-layered integument protects the megasporangium and, later, the embryo sac.

From Textbooks ● Jan. 1, 2015

Ovules, or megasporangia, are clusters of pods in the middle of the ovary.

From Textbooks ● Jan. 1, 2015