phenology

phenology is a   Noun

Definition:

[1] 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.

Synonyms: