A medium-sized insectivorous bat found in Eurasia and Africa.
a chiefly Eurasian bat (genus Eptesicus, family Vespertilionidae, in particular the widespread E. serotinus)
an African bat (genus Pipistrellus, family Vespertilionidae)‘The Serotine (Eptesicus serotinus) is one of our less common species and is found mainly south of a line from The Wash to parts of South Wales.’
- ‘In the summer, serotines roost in tree hollows and attics.’
Late 18th century from French sérotine, from Latin serotinus ‘of the evening, late’, from serus ‘late’.