Secern \Se*cern"\, v. t. [imp. & p. p. {Secerned}; p. pr. & vb. n. {Secerning}.] [L. secernere. See {Secrete}.] 1. To separate; to distinguish. [1913 Webster] Averroes secerns a sense of titillation, and a sense of hunger and thirst. --Sir W. Hamilton. [1913 Webster] 2. (Physiol.) To secrete; as, mucus secerned in the nose. --Arbuthnot. [1913 Webster]