micropyle

mi·cro·pyle

M0276400 (mī′krə-pīl′)n.1. Botany A minute opening in the ovule of a seed plant through which the pollen tube usually enters.2. Zoology A pore in the membrane covering the ovum of some animals through which a spermatozoon can enter.

[micro- + Greek pulē, gate.]

mi′cro·py′lar adj.

micropyle

(ˈmaɪkrəʊˌpaɪl) n1. (Botany) a small opening in the integuments of a plant ovule through which the male gametes pass2. (Zoology) a small pore in the shell of an insect's eggs through which the sperm passes[C19: from micro- + Greek pulē gate] ˌmicroˈpylar adj

mi•cro•pyle

(ˈmaɪ krəˌpaɪl)

n. 1. the surface of the membrane through which sperm is transported to the ovum in fertilization. 2. the opening in a seed plant ovule through which the pollen tube reaches the embryo. [1815–25; micro- + Greek pýlē gate] mi`cro•py′lar, adj.

Thesaurus

Noun

micropyle - minute opening in the wall of an ovule through which the pollen tube entersaperture - a natural opening in somethingovule - a small body that contains the female germ cell of a plant; develops into a seed after fertilization

Micropyle

micropyle

[′mī·krə‚pīl] (botany) A minute opening in the integument at the tip of an ovule through which the pollen tube commonly enters; persists in the seed as an opening or a scar between the hilum and point of radicle.

Micropyle

(1) An opening in the membrane of the eggs of insects, arachnids, some mollusks, fishes, and a number of other animals, through which the spermatozoon penetrates. (2) An opening in the apex of the ovule in higher seed plants, through which the pollen tube penetrates during pollination. The micropyle is formed because the integuments surrounding the ovule are unattached.

Micropyle

the canal in the integument or integuments of a plant through which the ovule is penetrated in gymnosperms by pollen grains and in angiosperms by pollen tubes. The external opening of the micropyle may be observed on the surface of a mature seed in the form of a dark dot.

micropyle

mi·cro·pyle

(mī'krō-pīl), 1. Minute opening believed to exist in the investing membrane of certain oocytes as a point of entrance for the sperm. 2. Former name for micropore. [micro- + G. pylē, gate]

micropyle

(mī′krə-pīl′)n. Zoology A pore in the membrane covering the ovum of some animals through which a spermatozoon can enter.

mi′cro·py′lar adj.

micropyle

a small canal in the integument surrounding the ovule of a flowering plant, through which the POLLEN TUBE usually enters the ovule on the way to the EMBRYO SAC. Water enters the seed via the micropyle prior to GERMINATION.

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Words related to micropyle

noun minute opening in the wall of an ovule through which the pollen tube enters

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