Definitions
from The Century Dictionary and Cyclopedia
- n. Same as oölemma.
Etymologies
Sorry, no etymologies found.
Examples
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The human ovum after issuing from the Graafian follicle, surrounded by the clinging cells of the discus proligerus (in two radiating crowns). z ovolemma (zona pellucida, with radial porous canals), p cytosoma (protoplasm of the cell-body, darker within, lighter without), k nucleus of the ovum (embryonic vesicle).
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The globular yelk is surrounded by the thick transparent germinal membrane (ovolemma, or zona pellucida).
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During these important processes, that take place in just the same way in the Amphioxus, a tail-like projection grows out of the posterior end of the larva-body, and the larva folds itself up within the round ovolemma in such a way that the dorsal side is curved and the tail is forced on to the ventral side.
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The little globule is surrounded by a thick capsule of glass-like transparency, the zona pellucida, or ovolemma pellucidum
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By the vibrations of these slender hairs the gastrula of the Amphioxus swims about in the sea, when it has pierced the thin ovolemma, like the gastrula of many other animals
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When the Ascidia-larva has attained this stage of development it begins to move about in the ovolemma.
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Inside a structureless, thin, but firm membrane (ovolemma, Figure 1.52 c) we find a large, quite clear, and transparent globule of albumin (d).
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But in most animals they at once begin to change; the change consists partly in the formation of connections with the yelk, which serve to nourish the ovum, and partly of external membranes for their protection (the ovolemma, or prochorion).
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The globular mass of yelk (b) is enclosed by a transparent membrane (the ovolemma or zona pellucida [a]), and contains a noncentral nucleus (the germinal vesicle, c).
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In 1 the follicle-cells still form a simple, and in 2 a double, stratum round the young ovum; in 2 they are beginning to form the ovolemma or the zona pellucida (a).
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