serotine (adj.)

"late," 1590s, from French sérotine, from Latin serotinus "that which comes late; that which happens in the evening," from sero, adverb of serus "late" (see soiree). Also as a noun, a type of small, brown bat, from 1771. Related: serotinous, in botany (1880) "appearing later in the season than usual."

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Definitions of serotine from WordNet

serotine (n.)
common brown bat of Europe;
Synonyms: European brown bat / Eptesicus serotinus