serotinal UK /sɪˈɹɒtɪnəl/US /səˈɹɑtɪnəl/ adjective2 •Occurring in or pertaining to late summer.In these population dynamic trends obvious differences exist between the aestival and serotinal aspects. — 1986 •Synonym of serotine (“developing at a later time or later in a season, especially than is customary with allied species; specifically (botany), of a plant: flowering late in a season”).
