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protoplasm
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- Protoplasm - n. - The viscid and more or less granular material of vegetable and animal cells, possessed of vital properties by which the processes of nutrition, secretion, and growth go forward; the so-called " physical basis of life;" the original cell substance, cytoplasm, cytoblastema, bioplasm sarcode, etc.
- Protoplasmatic - a. - Protoplasmic.
- Protoplasmic - a. - Of or pertaining to the first formation of living bodies.
- Protoplasmic - a. - Of or pertaining to protoplasm; consisting of, or resembling, protoplasm.
- Rejuvenescence - n. - A method of cell formation in which the entire protoplasm of an old cell escapes by rupture of the cell wall, and then develops a new cell wall. It is seen sometimes in the formation of zoospores, etc.
- Oospere - n. - An analogous mass of protoplasm in the ovule of a flowering plant; an embryonic vesicle.
- Metabolism - n. - The act or process, by which living tissues or cells take up and convert into their own proper substance the nutritive material brought to them by the blood, or by which they transform their cell protoplasm into simpler substances, which are fitted either for excretion or for some special purpose, as in the manufacture of the digestive ferments. Hence, metabolism may be either constructive (anabolism), or destructive (katabolism).
- Gymnoplast - n. - A cell or mass of protoplasm devoid of an envelope, as a white blood corpuscle.
- Nucleoplasm - n. - The matter composing the nucleus of a cell; the protoplasm of the nucleus; karyoplasma.
- Paramitome - n. - The fluid portion of the protoplasm of a cell.
- Myeloidin - n. - A substance, present in the protoplasm of the retinal epithelium cells, and resembling, if not identical with, the substance (myelin) forming the medullary sheaths of nerve fibers.
- Ectoplasm - n. - The outer hyaline layer of protoplasm in a vegetable cell.
- Karyoplasma - n. - The protoplasmic substance of the nucleus of a cell: nucleoplasm; -- in opposition to kytoplasma, the protoplasm of the cell.
- Idioplasma - n. - That portion of the cell protoplasm which is the seat of all active changes, and which carries on the function of hereditary transmission; -- distinguished from the other portion, which is termed nutritive plasma. See Hygroplasm.
- Nucleus - n. - A body, usually spheroidal, in a cell or a protozoan, distinguished from the surrounding protoplasm by a difference in refrangibility and in behavior towards chemical reagents. It is more or less protoplasmic, and consists of a clear fluid (achromatin) through which extends a network of fibers (chromatin) in which may be suspended a second rounded body, the nucleolus (see Nucleoplasm). See Cell division, under Division.
- Spermoplasma - n. - The protoplasm of the sperm cell.
- Entoplasm - n. - The inner granular layer of protoplasm in a developing ovum.
- Leucoplastid - n. - One of certain very minute whitish or colorless granules occurring in the protoplasm of plants and supposed to be the nuclei around which starch granules will form.
- Ectosarc - n. - The semisolid external layer of protoplasm in some unicellular organisms, as the amoeba; ectoplasm; exoplasm.
- Mitome - n. - The denser part of the protoplasm of a cell.
- Demilune - n. - A crescentic mass of granular protoplasm present in the salivary glands.
- Endoplasm - n. - The protoplasm in the interior of a cell.
- Syncytium - n. - Tissue in which the cell or partition walls are wholly wanting and the cell bodies fused together, so that the tissue consists of a continuous mass of protoplasm in which nuclei are imbedded, as in ordinary striped muscle.
- Intracellular - a. - Within a cell; as, the intracellular movements seen in the pigment cells, the salivary cells, and in the protoplasm of some vegetable cells.
- Karyostenosis - n. - Direct cell division (in which there is first a simple division of the nucleus, without any changes in its structure, followed by division of the protoplasm of the karyostenotic mode of nuclear division.
- Eleidin - n. - Lifeless matter deposited in the form of minute granules within the protoplasm of living cells.
- Ectoplasm - n. - The outer transparent layer of protoplasm in a developing ovum.
- Fovilla - n. - One of the fine granules contained in the protoplasm of a pollen grain.