Definition of "phenology" [phe•nol•o•gy]

• The scientific study of periodic biological phenomena, such as flowering, breeding, and migration, in relation to climatic conditions. (noun)
• The relationship between a periodic biological phenomenon and climatic conditions. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Hydrology, the research gathers together more than 25,000 long-term phenology trends for 726 species of plants and animals."
• "Hydrology, the researchers said they analyzed more than 25,000 long-term phenology trends for"
• "The study of the seasons, known as phenology, is important for measuring how the weather is changing in Britain with global warming."