| 释义 |
myoid
myoid (ˈmaɪɔɪd) n (Anatomy) a section of a retinal cone or rod which is sensitive to changes in light intensityadj (Anatomy) of or relating to the myoid of a retinal cone or rod
myoid (ˈmaɪɔɪd) adj (Anatomy) resembling muscle; composed of or involving muscleThesaurus| Adj. | 1. | myoid - resembling muscle |
EncyclopediaSeeellipsoidmyoid
myoid [mi´oid] resembling muscle.my·oid (mī'oyd), 1. Resembling muscle. 2. One of the fine, contractile, threadlike protoplasmic elements found in certain epithelial cells in lower animals. 3. A contractile part of retinal cones in certain fish and amphibia. In mammals, the myoid is the inner part of the inner segment of rods and cones; it contains microtubules, the Golgi apparatus, endoplasmic reticulum, and ribosomes, but no myofibrils. [myo- + G. eidos, appearance] my·oid (mī'oyd) 1. Resembling muscle. 2. One of the fine, contractile, threadlike protoplasmic elements found in certain epithelial cells in lower animals. [myo- + G. eidos, appearance]ellipsoid1. The refractile outer portion of the inner member of a rod or cone cell. It is located between the myoid and the outer member of the cell, and contains mitochondria. The myoid is in contact with the external limiting membrane of the retina while the outer member is next to the pigment epithelium. 2. Surface of revolution generated by rotating an ellipse about a major or minor axis. |