| corpus luteum | <gynaecology> A yellow glandular mass in the ovary formed by an ovarian follicle that has matured and discharged its ovum. The corpus luteum secretes progesterone. If the ovum has been impregnated, the corpus luteum increases in size and persists for several months (corpus luteum graviditatis). If impregnation has not taken place, the corpus luteum degenerates and shrinks (corpus luteum menstruationis). Synonym: yellow body of ovary. (13 Nov 1997) |
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| corpus luteum deficiency syndrome | <syndrome> Functional disturbances caused by insufficient ovarian luteinization; reflected by inadequate luteal phase endometrial response. (05 Mar 2000) |
| corpus luteum haematoma | A haematoma with a lining formed by the thinned-out bright yellow lutein zone; gradual resorption of the blood elements leaves a cavity filled with a clear fluid, i.e., a corpus luteum cyst. Synonym: corpus luteum haematoma. (05 Mar 2000) |
| corpus luteum hormone | <biochemistry, gynaecology> Produced in the corpus luteum, as an antagonist of oestrogens. Promotes proliferation of uterine mucosa and the implantation of the blastocyst, prevents further follicular development. (18 Nov 1997) |
| corpus luteum hormone unit | The progestational activity of 1 mg of unit of progestational activity; standard preparation of pure progesterone. See: Clauberg test, Corner-Allen unit. Synonym: corpus luteum hormone unit, unit of luteinizing activity. (05 Mar 2000) |
| corpus luteum maintenance | Physiologic and biochemical factors that maintain an actively functioning corpus luteum. (12 Dec 1998) |
| corpus luteum regression | Involution and cessation of endocrine function of a corpus luteum. (12 Dec 1998) |
| corpus luysi | A circumscript nucleus, shaped like a biconvex lens, located in the ventral part of the subthalamus on the dorsal surface of the peduncular part of the internal capsule immediately rostral to the substantia nigra. The nucleus receives a massive topographic projection from the lateral segment of the globus pallidus, and a somatopically organised projection from the ipsilateral motor cortex; a smaller bundle of afferents from the centromedian nucleus of the thalamus terminate in the rostral part of the nucleus The subthalamic nucleus projects to both pallidal segments, to the pars reticulata of the substantia nigra, and in a small way to the ipsilateral pedunculopontine nucleus. Synonym: nucleus subthalamicus, corpus luysi, Luys' body, nucleus of Luys. (05 Mar 2000) |
| corpus mamillare | A small, round, paired cell group that protrudes into the interpeduncular fossa from the inferior aspect of the hypothalamus. It receives hippocampal fibres through the fornix and projects fibres to the anterior thalamic nuclei and into the brainstem tegmentum. Synonym: corpus mamillare, mamillary tubercle of hypothalamus. (05 Mar 2000) |
| corpus mammae | The principal part of the breast, consisting of glandular tissue and its supporting fibrous tissue. It forms a conical mass converging toward the nipple and is surrounded by adipose tissue. Synonym: corpus mammae. (05 Mar 2000) |
| corpus mandibulae | The heavy, U-shaped, horizontal portion of the mandible extending posteriorly to the angle where it is continuous with the ramus; it supports the lower teeth. Synonym: corpus mandibulae. (05 Mar 2000) |
| corpus maxillae | The central portion of the maxilla hollowed out by the maxillary sinus; it presents orbital, nasal, anterior, and infratemporal surfaces and supports four processes, frontal, zygomatic, palatine, and alveolar. Synonym: corpus maxillae. (05 Mar 2000) |
| corpus medullare cerebelli | The interior white substance of the cerebellum. (05 Mar 2000) |
| corpus nuclei caudati | The suprathalamic part of the caudate nucleus lying in the floor of the central part of the lateral ventricle. Synonym: corpus nuclei caudati. (05 Mar 2000) |
| corpus olivare | <zoology> A genus of polished marine gastropod shells, chiefly tropical, and often beautifully coloured. Origin: L. An olive. Source: Websters Dictionary (01 Mar 1998) |