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.
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primary pentosuria n. See essential pentosuria.
- Primary-phloem
noun, Botany. 1. phloem derived directly from the growth of an apical meristem.
- Primary-process
noun, Psychoanalysis. 1. the generally unorganized mental activity characteristic of the unconscious and occurring in dreams, fantasies, and related processes. primary process n. In psychoanalysis, the mental process directly related to the functions of the id and characteristic of unconscious mental activity, marked by unorganized, illogical thinking and by the tendency to seek immediate discharge […]
- Primary-producer
noun, Biology. 1. any green plant or any of various microorganisms that can convert light energy or chemical energy into organic matter.
- Primary productivity
noun a measure of the rate at which new organic matter is developed through photosynthesis and chemosynthesis in producer organisms based on the oxygen released and carbon taken in; the transformation of chemical or solar energy to biomass Examples Most primary productivity occurs through photosynthesis, where green plants convert solar energy, carbon dioxide, and water […]