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secretionsecretio (lat.); sécrétion (fr.); Sekretion (ger.)

  • In an animal or vegetable body, the action of a gland or some analogous organ in extracting certain matters from the blood or sap and elaborating from them a particular substance, either to fulfil some function within the body or to undergo excretion as waste. (OED 2011)
    metabolism
    1494
    in secretione sanguis
    Laurentius Laurentianus (1494). Galeni in sententias Hippocratis interprete Laurentio Laurentiano Florentino: liber quintus [p. 17].
    1646
    It cannot bee called their urine; not only because they want those parts of secretion; but because it is emitted aversly or backward, by both sexes.
    Browne, T. (1646). Pseudodoxia Epidemica: 137 (III, 13).
    1708
    Animal Secretion
    Wainewright, J. (1708). The Doctrine of Animal Secretion in Several Propositions.
    1708
    Animal Secretion
    Keill, J. (1708). An Account of Animal Secretion.
    1711
    la separation de chacune de ces liqueurs du reste du sang a esté nommé Secretion par les anatomistes
    Winslaw, J.B. (1711). De la manière dont se font les secretions dans les glandes. Hist. Acad. Roy. Sci. 241-247: 241.
    1752

    il semble que nous confondions la sécrétion avec l’excrétion [...] il n’y a pas ordinairement grande différence d’une de ces fonctions à l’autre.

    Bordeu, T. de (1752). Recherches anatomiques sur la position des glandes, et sur leur action (in: Œuvres complètes, 2 vols., Paris 1818, I, 45-208): 50.

    1982

    secretion 1: Any substance or product elaborated and released by a cell or gland to perform a specific function; secreta. 2: The process of elaboration and release; secretory; secretitious; cf. excretion.

    Lincoln, R.J., Boxshall, G.A. & Clark, P.F. (1982). A Dictionary of Ecology, Evolution and Systematics: 223.