ca·lor·ic (kə-lôrĭk, -lŏr-)
1. Of or relating to heat: the caloric effect of sunlight.
2. Of or relating to calories: the caloric content of foods.
A hypothetically indestructible, uncreatable, highly elastic, self-repellent, all-pervading fluid formerly thought responsible for the production, possession, and transfer of heat.
[French calorique, from Latin calor, heat; see kelə-1 in the Appendix of Indo-European roots.]
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.