Semper's larva (CNID: Anthozoa) In Zoantharia, pelagic larva with long cilia.
Semper's rib (ARTHRO: Insecta) In Lepidoptera, a degenerate trachea present in the wing, alongside a functioning trachea within the vein cavity.
senescence n. [L. senescere, to grow old] The gradual deterioration of function in an organism leading to an increased probability of death; the ageing process.
senior homonym The earliest published of two or more identical names for the same or different taxa. see homonym, junior homonym.
senior synonym The earliest published of two or more available names for the same taxon. see synonym, junior synonym.
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