n. a tumor of nervous tissue derived from interstitial cells, in which the cells are relatively well-differentiated and resemble astrocytes. The occur primarily in the crebrum and cerebellum. Stedman [ PJC ]

n. [ Gr. ky`tos hollow vessel + -blast. ] (Biol.) The nucleus of a cell; the germinal or active spot of a cellule, through or in which cell development takes place. [ 1913 Webster ]

n. [ NL., fr. Gr. ky`tos hollow vessel + &unr_;&unr_;&unr_;&unr_; growth. ] (Biol.) See Protoplasm. [ 1913 Webster ]

n.; pl. Cytococci [ NL., fr. Gr. ky`tos hollow vessel + &unr_;&unr_;&unr_;&unr_; kernel. ] (Biol.) The nucleus of the cytula or parent cell. Hæckel. [ 1913 Webster ]

n. [ Gr. ky`tos hollow vessel, from &unr_;&unr_;&unr_;&unr_;. See Cyst. ] (Biol.) A nonnucleated mass of protoplasm, the supposed simplest form of independent life differing from the amoeba, in which nuclei are present. [ 1913 Webster ]

n. [ Gr. ky`tos hollow vessel + E. genesis. ] (Biol.) Development of cells in animal and vegetable organisms. See Gemmation, Budding, Karyokinesis; also Cell development, under Cell. [ 1913 Webster ]

{ } a. (Biol.) Of or pertaining to cytogenesis or cell development. [ 1913 Webster ]

a. (Anat.) Producing cells; -- applied esp. to lymphatic, or adenoid, tissue. [ 1913 Webster ]

n. (Biol.) Cell production or development; cytogenesis. [ 1913 Webster ]

a. [ Gr. ky`tos hollow vessel + -oid. ] (Physiol.) Cell-like; -- applied to the corpuscles of lymph, blood, chyle, etc. [ 1913 Webster ]

n. [ Gr. ky`tos hollow vessel + &unr_;&unr_;&unr_;&unr_; a mold. ] (Biol.) The substance of the body of a cell, as distinguished from the karyoplasma, or substance of the nucleus. -- Cy`to*plas"mic a. [1913 Webster]

n. (Biochemistry) A pyrimidine (C4H5N3O) which is one of the four major basic components of DNA and RNA in most organisms, forming glyosides with ribose and deoxyribose. It is the basic component of cytidine, deoxycytidine, cytosine, cytidine monophosphate, and derivatives of those compounds. [ PJC ]

a. (Cell Biology) Of or pertaining to the cytoskeleton; as, cytoskeletal microtubules. [ PJC ]

n. (Cell Biology) An arrangement of microtubules, microfilaments, and larger filaments within a cell serving to provide structural support of components of the cell, and to transport components from one part of the cell to another; the filaments are composed of protein and form a latticelike arrangement which may change rapidly with time. [ PJC ]

n. (Biology) The soluble components of the fluid matter enclosed within the cellular membrane; the portion of the cytoplasm which remains after removal of particulate components. [ PJC ]

n. (Biology) The inhibition or cessation of cell growth or division. [ PJC ]

a. (Biology) Having an inhibitory action on cell growth or cell division. [ PJC ]

n. The mouth of a protozoan. [ WordNet 1.5 ]

n. (Biology) The movement of cells toward or away from other cells, as a result of some stimulation, such as chemical signals transmitted and received by the cells. [ PJC ]

n. (Biology) A branch of taxonomy which uses the characteristics of cellular structures, such as somatic chromosomes, to classify organisms. [ PJC ]

-- cy`to*tax*on"o*mist, n. -- cy`to*tax`o*nom"ic, a. -- cy`to*tax`o*nom"ic*al*ly, adv. [PJC]

n. [ Gr. gymno`s naked + E. cytode. ] (Biol.) A cytode without either a cell wall or a nucleus. Haeckel. [ 1913 Webster ]

n. [ Haema + Gr. ky`tos a hollow vessel + -meter. ] (Physiol.) An apparatus for determining the number of corpuscles in a given quantity of blood. [ 1913 Webster ]

‖n. [ NL., fr. Gr. a"i^ma blood + ky`tos hollow vessel + ly`ein to loosen, dissolve.] (Physiol.) See Haemocytotrypsis. [1913 Webster]

n. See Haemacytometer. [ 1913 Webster ]

‖n. [ NL., fr. Gr. a"i^ma blood + ky`tos hollow vessel + tri`bein to rub, grind.] (Physiol.) A breaking up of the blood corpuscles, as by pressure, in distinction from solution of the corpuscles, or haemocytolysis. [1913 Webster]

n. [ Leucocyte + genesis. ] (Physiol.) The formation of leucocytes. [ 1913 Webster ]

n. An abnormal physiological condition characterized by the presence of macrocytes in the blood. [ WordNet 1.5 ]

‖n. pl. [ NL., fr. Gr. &unr_; a hide + &unr_; a skin. ] (Zool.) Same as Holothurioidea. [ 1913 Webster ]