| GnRH | Gonadotropin Releasing Hormone [HP 1898, 2034] = LHRH = Go... |
|---|---|
| MLF | Median Longitudinal Fasciculus Role; links the CN III Nucleus with Contralateral CN ... |
| CN | caudate nucleus; cellulose nitrate; charge nurse; child nutrition; chloroacetophenone; clinical nurs... |
| LCN | lateral cervical nucleus; left caudate nucleus; lipocalin |
| RN | radionuclide; red nucleus; Registered Nurse; registry number; residual nitrogen; reticular nucleus |
| principal islets | Separate globular aggregates made up mostly of endocrine pancreatic tissue; present in some fishes and snakes. (05 Mar 2000) |
|---|---|
| principal optic axis | A line passing through the centre of the lens of a refracting system at right angles to its surface. (05 Mar 2000) |
| principal plane | <microscopy> A plane normal to the principal axis of a lens, passing through a principal point. In geometrical construction of ray diagrams through a perfect lens, the single plane that can be considered (disregarding the refraction of the rays at each optical interface) to convert paraxial rays into rays converging onto the rear focal point. For thin symmetrical lenses, there is one principal plane that bisects the lens. For thick or complex lenses, there is a principal plane for the paraxial ray to the left, and another for the paraxial ray to the right, of the lens. (05 Aug 1998) |
| principal point | <microscopy> Mutually conjugate points lying on the lens axis and producing a magnification of one. Object and image distance as well as focal length are calculated (measured) from these points. (05 Aug 1998) |
| focus, principal | <physics> The point at which a lens focuses an axial object point. Synonymous with focal point. (05 Aug 1998) |
| ventral | 1. Pertaining to the belly or to any venter. 2. Denoting a position more toward the belly surface than some other object of reference, same as anterior in human anatomy. Origin: L. Ventralis (18 Nov 1997) |
| ventral aortas | The paired vessels ventral to the pharynx, which give rise to the aortic arches. (05 Mar 2000) |
| ventral border | The ventral or most forward margin of a structure. Synonym: anterior margin, ventral border. (05 Mar 2000) |
| ventral branch | Rami ventralis See: ventral primary rami of cervical spinal nerves, ventral primary rami of lumbar spinal nerves, ventral primary rami of sacral spinal nerves, ventral primary ramus of spinal nerve. (05 Mar 2000) |
| ventral decubitus | Pressure sores (decubitus ulceration) occurring in ventral locations, such as the abdominal wall or the anterior surface of an extremity. (05 Mar 2000) |
| ventral glands | <entomology> Insect structures that originate from the ectoderm of the ventrocaudal part of the head and serve as a source of ecdysone. Synonym: peritracheal glands, prothoracic glands, thoracic glands, ventral glands. (05 Mar 2000) |
| ventral hernia | An abdominal incisional hernia. (05 Mar 2000) |
| ventral horn | The anterior or frontal division of the lateral ventricle of the brain, extending forward from Monro's interventricular foramen. See: lateral ventricle. (05 Mar 2000) |
| ventral mesogastrium | The primitive midline mesentery extending between future stomach and proximal duodenum and the anterior abdominal wall superior to the umbilicus (umbilical vein). The liver develops within it, and consequently the lesser omentum, coronary and falciform ligaments are derivatives of it. The umbilical vein runs in its caudal free edge, becoming the postnatal round ligament of the liver. (05 Mar 2000) |
| ventral nervous system defective | <molecular biology> A Drosophila gene encoding an integral membrane glycoprotein related to amyloidogenic glycoprotein. (12 Jan 1998) |