Primary mirror
noun
1.
the mirror that collects and focuses the incoming light in a reflecting telescope
Read Also:
- Primary nondisjunction
primary nondisjunction n. Nondisjunction occurring in a previously normal cell.
- Primary oocyte
primary oocyte n. An oocyte that is in its growth phase and is at a stage that is prior to the completion of the first maturation division.
- Primary-optical-area
noun, Graphic Design. 1. a point in or toward the upper left-hand corner of a printed page, advertisement, or the like, looked at first in reading. Abbreviation: POA.
- Primary ovarian follicle
primary ovarian follicle n. An immature ovarian follicle in which the developing oocyte is surrounded by a layer or layers of cuboidal or columnar follicular cells.
- Primary pentosuria
primary pentosuria n. See essential pentosuria.