Definition of therm
: a unit for quantity of heat that equals 100,000 British thermal units
Recent Examples of therm from the Web
Natural gas futures rose 4.8 percent to 37.94 pence a therm on ICE Futures Europe on Monday.
Residential gas, which used to cost $1 per therm in 2008, is running closer to 75 cents.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'therm.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of therm
Greek thermē heat, from thermos hot; akin to Latin formus warm, Sanskrit gharma heat
First Known Use: 1888See Words from the same year
Definition of therm-
1 : heat thermostat
2 : thermoelectric thermopile
Origin and Etymology of therm-
Greek, from thermē
Definition of -therm
: animal having a (specified) body temperature ectotherm
Origin and Etymology of -therm
Greek thermē heat
Seen and Heard
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