n. [ LL. acetositas. See Acetous. ] The quality of being acetous; sourness. [ 1913 Webster ]

‖n. [ NL. See A- not, and Mitosis. ] (Biol.) Cell division in which there is first a simple cleavage of the nucleus without change in its structure (such as the formation of chromosomes), followed by the division of the cytoplasm; direct cell division; -- opposed to mitosis. It is not the usual mode of division, and is believed by many to occur chiefly in highly specialized cells which are incapable of long-continued multiplication, in transitory structures, and in those in early stages of degeneration. [ Webster 1913 Suppl. ]

‖n. [ L., fr. Gr. &unr_;; 'anti` against + &unr_; a falling, a case, &unr_; to fall. ] (Gram.) The putting of one case for another. [ 1913 Webster ]

‖n. [ NL., fr. Gr. &unr_; not fixed; 'a priv. + &unr_; to set. ] (Med.) A variety of chorea, marked by peculiar tremors of the fingers and toes. [ 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 ]

‖n. [ NL., from Gr. &unr_; skin + &unr_; bone. ] (Physiol.) Ossification of the dermis. [ 1913 Webster ]

‖n. [ NL. See Ect-, and Ostosis. ] (Physiol.) A process of bone formation in which ossification takes place in the perichondrium and either surrounds or gradually replaces the cartilage. [ 1913 Webster ]

n. [ NL. See Endo-, and Ostosis. ] (Physiol.) A process of bone formation in which ossification takes place within the substance of the cartilage. [ 1913 Webster ]

‖n. [ NL., fr. Gr. &unr_;; &unr_; out + &unr_; bone: cf. F &unr_; exostose. ] 1. (Med.) Any protuberance of a bone which is not natural; an excrescence or morbid enlargement of a bone. Coxe. [ 1913 Webster ]

2. (Bot.) A knot formed upon or in the wood of trees by disease.

n. (Physiol. Chem.) Hematin. [ R. ] [ 1913 Webster ]

‖ n. Same as Hematosis. [ 1913 Webster ]

n. (Physiol. Chem.) The hematin of blood. [ R. ] [ 1913 Webster ]

‖n. [ NL., fr. Gr. a"ima`twsis.] (Physiol.) (a) Sanguification; the conversion of chyle into blood. (b) The arterialization of the blood in the lungs; the formation of blood in general; haematogenesis. [1913 Webster]

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

n. [ NL., from Gr. &unr_; beyond, after + &unr_; a falling upon, fr. &unr_; to fall in or upon; &unr_; in + &unr_; to fall. ] (Chron.) The suppression of a day in the calendar to prevent the date of the new moon being set a day too late, or the suppression of the bissextile day once in 134 years. The opposite to this is the proemptosis, or the addition of a day every 330 years, and another every 2, 400 years. [ 1913 Webster ]

‖n. [ L., a change of body (by the soul), fr. Gr. &unr_;. ] (Biol.) The assimilation by one body or organism of the elements of another. [ 1913 Webster ]

‖n. [ NL., fr. Gr. &unr_; a thread. ] (Biol.) See Karyokinesis. [ 1913 Webster ]

n. (Biol.) a viral disease (usually fatal) of rabbits. [ WordNet 1.5 ]

‖n. [ NL., from Gr. 'oste`on a bone. ] (Physiol.) Bone formation; ossification. See Ectostosis, and Endostosis. [ 1913 Webster ]

n. (Med.) Same as pachyderma.
Syn. -- pachyderma, pachydermia, nevoid elephantiasis. [ WordNet 1.5 ]

‖n. [ NL., from Gr. pare`mptwsis a coming in beside; para` beside + 'empiptein to fall in. ] Same as Parembole. [ 1913 Webster ]

‖n. [ NL. See Para-, and Ostosis. ] (Physiol.) Ossification which takes place in purely fibrous tracts; the formation of bone outside of the periosteum. [ 1913 Webster ]

a. (Chem.) Of, pertaining to, resembling, or derived from, pectose; specifically, designating an acid supposed to constitute largely ordinary pectin or vegetable jelly. [ 1913 Webster ]

n. [ NL., from Gr. &unr_; to fall in before; &unr_; before + &unr_; in + &unr_; to fall. ] (Chron.) The addition of a day to the lunar calendar. [ R. ] See Metemptosis. [ 1913 Webster ]

n. [ Proto- + silicate. ] (Chem.) A silicate formed with the lowest proportion of silicic acid, or having but one atom of silicon in the molecule. [ 1913 Webster ]

‖n. [ NL., fr. Gr. ptw^sis a falling. ] (Med.) Drooping of the upper eyelid, produced by paralysis of its levator muscle. [ 1913 Webster ]

n. [ Cf. F. schistosité. ] (Geol.) The quality or state of being schistose. [ 1913 Webster ]

‖n. [ NL. ] Same as Synosteosis. [ 1913 Webster ]

n. [ L. ventositas: cf. F. ventosité. See Ventose, n. ] Quality or state of being ventose; windiness; hence, vainglory; pride. Bacon. [ 1913 Webster ]