n
A meroblastic egg, ovum, or ovule which has acquired its store of foodyolk, or been otherwise modified from its original primitive condition as an egg-cell or protovum
adj
(biology, of an ovum) Tending to segment uniformly, and having little or no yolk embedded in the protoplasm.
adj
(biology) Pertaining to a blastopore; blastoporal.
adj
Of or relating to a blastostyle.
adj
(biology) Having the yolk placed in the centre of the cytoplasm of the ovum
n
(biology) The point in the yolk of an egg at which development begins.
n
(cytology) A short microscopic hairlike organelle projecting from a eukaryotic cell (such as a unicellular organism or one cell of a multicelled organism) which serve either for propulsion by causing currents in the surrounding fluid or as sensors.
n
The equivalent of a blood platelet in insects
adj
(biology) Having the food yolk, at the commencement of segmentation, in a peripheral position, and the cleavage process confined to the centre of the egg.
n
A protein found in the eggs of the tortoise.
n
(biology) The tissue surrounding the embryo of flowering plant seeds, that provides nutrition to the developing embryo; usually triploid.
n
(biology) A polynuclear mass of protoplasm, not divided into separate cells, from which certain ova are developed.
adj
(biology) Having the yolk evenly distributed within the cytoplasm
n
A group of kinetids, fibrils and microtubules in many ciliates
adj
(biology) Having an even distribution of yolk in the cytoplasm.
n
The cavity in the foodyolk of a meroblastic ovum.
n
(biochemistry) A protein found in egg yolk.
n
A synaptic complex in the mushroom body of the brain of some insects
n
(botany) phloem containing sieve cells
n
(biology) The intercellular material, composed mostly of pectin, that facilitates adhesion between neighbouring plant cells
n
(biochemistry) A form of casein found in egg yolk
n
The part of the vitellus of the ovum that furnishes cells which contribute to the body of the embryo.
n
(biology) The outer body of an invertebrate; the integument
n
(cytology) A mobile cell that transports the buds of doliolids
n
(biology) A mass of cytoplasm, containing many nuclei, created by the aggregation of amoeboid cells of slime molds during their vegetative phase. When capitalised as a proper name, Plasmodium is a genus of protozoan parasites responsible for such diseases as malaria
n
(anatomy) A capsule of cells that surrounds the primordial ova in the embryonic ovary
n
(biology) The semipermeable outer cell wall of plant cells.
adj
That forms layers of etioplasts
n
A pore cell, in molluscs, that produces hemocyanin
n
(biology) A structure situated between the primary cell wall and the plasma membrane of plant cells
n
(biology) Any cell that has cilia borne on a trochophore.
n
A type of gland, in flatworms and similar organisms, that secretes yolk.
n
yolk sac; umbilical vesicle
n
(biology, dated) A yolk-forming organ.
adj
(zoology) Producing yolk, or vitelline substance; applied to certain cells formed in the ovaries of insects and supposed to supply nutrition to the developing ova.
adj
Of, pertaining to, or resembling the yolk of an egg.
n
(zoology) A gland secreting the yolk of the eggs in trematodes, turbellarians, and some other helminths.
n
(biochemistry) An egg-yolk precursor protein expressed in the females of nearly all oviparous species.
adj
That breaks down egg yolk
n
(biology) The contents or substance of the ovum; egg yolk.
n
Obsolete form of yolk. [The yellow, spherical part of an egg that is surrounded by the white albumen, and serves as nutriment for the growing young.]
n
The yellow, spherical part of an egg that is surrounded by the white albumen, and serves as nutriment for the growing young.
n
(anatomy) A glycoprotein membrane surrounding the plasma membrane of an oocyte.
n
(medicine) Initialism of zona pellucida. [(anatomy) A glycoprotein membrane surrounding the plasma membrane of an oocyte.]
n
An undeveloped sporozoan produced by multiple fission of a zygote
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