noun, Cell Biology.
See under spermatocyte.
secondary spermatocyte n.
The spermatocyte derived from a primary spermatocyte by the first meiotic division and giving rise by the second meiotic division to two spermatids.
verb (used without object), seceded, seceding. 1. to withdraw formally from an alliance, federation, or association, as from a political union, a religious organization, etc. verb 1. (intransitive) often foll by from. (of a person, section, etc) to make a formal withdrawal of membership, as from a political alliance, church, organization, etc
- Secd machine
Stack Environment Control Dump machine
noun, Biochemistry. 1. the arrangement of a polypeptide into a regular alpha helix, beta structure, or random coil configuration by the formation of intramolecular hydrogen bonds along the length of the chain. secondary structure The protein structure characterized by folding of the peptide chain into an alpha helix, beta sheet, or random coil. See also […]
- Secondary succession
secondary succession See under succession.