spermatozoid
IPA: spˈɝmʌtˈɑzɔɪd
noun
- (biology) A motile, ciliated male gamete produced in the antheridium of an alga, fern or gymnosperm.
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Examples of "spermatozoid" in Sentences
- The spermatozoids and egg cells are extruded from the conceptacles.
- _J_, a small portion of one of these more magnified, showing a spermatozoid in each cell.
- The former divides repeatedly, until a mass of about thirty-two sperm cells is formed, each giving rise to a large spirally-coiled spermatozoid.
- As a result of the entrance of the spermatozoid (fertilization), the egg cell becomes surrounded by a thick brown wall, and becomes a resting spore.
- By careful observation the student may possibly be able to follow the spermatozoid into the oögonium, where it enters the egg cell at the clear spot on its surface.
- The antheridia (Fig. 26, _F_, _G_) are small oblong cells, at first colorless, but when ripe containing numerous glistening, reddish brown dots, each of which is part of a spermatozoid.
- Owing to the small size of the spermatozoids, and the opacity of the eggs, it is impossible to see whether more than one spermatozoid penetrates it; but from what is known in other cases it is not likely.
- If the latter is not fertilized, the inner walls of the neck cells turn brown, and the egg cell dies; but if a spermatozoid penetrates to the egg cell, the latter develops a wall and begins to grow, forming the embryo or young sporogonium.
- Of the inner cells, the second series, while not increasing in diameter, elongate, assuming an oblong form, and from the innermost are developed long filaments (_I_, _J_) composed of a single row of cells, in each of which is formed a spermatozoid.
- The antheridia (Fig. 29, _E_) are hemispherical masses of closely set colorless cells, each of which develops a single spermatozoid which, like the tetraspores, is destitute of cilia, and is dependent upon the movement of the water to convey it to the neighborhood of the procarp.
- The movie seems to balance both views, even rewarding the Peter Pan character of Jayne with what she most desires -- a child, a wish realized in a gorgeous surreal drug trip with a teenager (Jayne floats in the stars and is met by a hyper-real spermatozoid) -- at the same time as it offers a practical resolution to the father issue for Laura.