| premaxilla | Origin: NL. See Pre-, and Maxilla. <anatomy> A bone on either side of the middle line between the nose and mouth, forming the anterior part of each half of the upper jawbone; the intermaxilla. In man the premaxillae become united and form the incisor part of the maxillary bone. Source: Websters Dictionary (01 Mar 1998) |
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| premaxillary | <anatomy> Situated in front of the maxillary bones; pertaining to the premaxillae; intermaxillary. A premaxilla. Source: Websters Dictionary (01 Mar 1998) |
| premaxillary bone | The anterior and inner portion of the maxilla, which in the foetus and sometimes in the adult is a separate bone; the incisive suture runs from the incisive canal between the lateral incisor and the canine tooth; according to K. Albrecht, the os incisivum is further divided by a suture between the two incisor teeth on each side into two bones, the endognathion and the mesognathion. Synonym: incisive bone, intermaxilla, intermaxillary bone, os intermaxillare, os premaxillare, premaxilla, premaxillary bone. (05 Mar 2000) |
| premaxillary suture | Line of union of the two portions of the maxilla (pre-and postmaxilla); it is present at birth but may persist into old age. Synonym: sutura incisiva, premaxillary suture. (05 Mar 2000) |
| premedication | <pharmacology, surgery> Preliminary medication, particularly internal medication to produce narcosis prior to inhalation anaesthesia. (18 Nov 1997) |
| premeiotic phase | The stage of nuclear changes in the sexual cells before the reduction of the chromosomes, embracing the cell generations up to that of the spermatogonia and oogonia. Synonym: prereduction phase. (05 Mar 2000) |
| premelanosome | A nonpigmented membrane-bound vesicle in a melanocyte that contains tyrosine and matures into the melanin-filled melanosome; prominent in melanocytes of albinos. (05 Mar 2000) |
| premenopause | The physiological period preceding the climacteric, during which occurs the regression of ovarian function, up to the menopause, the permanent cessation of the menstrual life. Since in the united states the age of the menopause ranges between 48 and 55 years, the premenopause refers in general to middle-aged women. (best & taylor's physiological basis of medical practice, 12th ed, p872) (12 Dec 1998) |
| premenstrual | <gynaecology, physiology> Occurring before menstruation. (18 Nov 1997) |
| premenstrual oedema | Retention of water and increase in weight, which occurs during or preceding menstruation. (05 Mar 2000) |
| premenstrual salivary syndrome | <syndrome> Glandular abnormalities occurring prior to the onset of menses, including swelling of the breast tissues and enlargement of the salivary glands. (05 Mar 2000) |
| premenstrual syndrome | <syndrome> A combination of emotional, physical, psychological, and mood disturbances that occur after ovulation and normally end with the onset of the menstrual flow. (12 Dec 1998) |
| premenstrual tension | <syndrome> A combination of emotional, physical, psychological, and mood disturbances that occur after ovulation and normally end with the onset of the menstrual flow. (12 Dec 1998) |
| premenstrual tension syndrome | <syndrome> A combination of emotional, physical, psychological, and mood disturbances that occur after ovulation and normally end with the onset of the menstrual flow. (12 Dec 1998) |
| premenstruum | The few days preceding menstruation. Origin: pre-+ L. Menstruum, ntr. Of menstruus, monthly, pertaining to menstruation (05 Mar 2000) |