Definition of thermoperiod
: the period of exposure of a plant to a particular temperature; specifically : the period characteristic of the diurnal alternation of day and night temperature when both period and temperature are at or near the optimum for the induction of various activities (as growth or flowering) — compare photoperiod
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!
Origin and Etymology of thermoperiod
therm- + period
Seen and Heard
What made you want to look up thermoperiod? Please tell us where you read or heard it (including the quote, if possible).