bioclimatic law

noun

: a statement in ecology: phenological events in temperate North America are generally altered about 4 days for each change of 5° of latitude northward, 5° of longitude eastward, or 400 feet of altitude upward, the vernal alteration being retardation (as of flowering), the autumnal being acceleration (as of leaf fall)

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!