Transitional zone
transitional zone n.
The region of the lens of the eye where cells from the anterior epithelial capsule become transformed into the fibers that compose the lens substance.
The portion of a scleral contact lens that joins the corneal and scleral sections.
Read Also:
- Transition-area
noun, Linguistics. 1. (in dialect geography) an area whose dialect has been influenced by the dialect of one or more neighboring focal areas. Compare focal area, relic area.
- Transitionary
noun 1. movement, passage, or change from one position, state, stage, subject, concept, etc., to another; change: the transition from adolescence to adulthood. 2. Music. a passing from one key to another; modulation. a brief modulation; a modulation used in passing. a sudden, unprepared modulation. 3. a passage from one scene to another by sound […]
- Transition-element
noun, Chemistry. 1. any element in any of the series of elements with atomic numbers 21–29, 39–47, 57–79, and 89–107, that in a given inner orbital has less than a full quota of electrons. transition element noun 1. (chem) any element belonging to one of three series of elements with atomic numbers between 21 and […]
- Transition gyrus
transition gyrus tran·si·tion gyrus (trān-zĭsh’ən, -sĭsh’-) n. A small convolution connecting two lobes or two main gyri in the depth of a sulcus. Also called annectent gyrus.
- Transition mutation
transition mutation n. A point mutation involving substitution of one base pair for another by replacement of one purine by another purine and of one pyrimidine by another pyrimidine but without change in the purine-pyrimidine orientation.