serotinal

[ si-rot-n-l, ser-uh-tahyn-l ]
/ sɪˈrɒt n l, ˌsɛr əˈtaɪn l /

adjective

pertaining to or occurring in late summer.

Origin of serotinal

First recorded in 1905–10; serotine1 + -al1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019