The Collaborative International Dictionary
Phenological
Phenology \Phe*nol"o*gy\, n. [Contracted from Phenomenology.] (Biol.) The science of the relations between climate and periodic biological phenomena, as the migrations and breeding of birds, the flowering and fruiting of plants, etc. -- Phe`no*log"ic*al, a. -- Phe`no*log"ic*al*ly, adv. -- Phe*nol"o*gist, n.
Wiktionary
phenological
a. Of or pertaining to phenology