Thĕr'mal, a.

a. [Fr. thermal, Sp. termal, It. termale, from Lat. thermæ, Gr. θέρμαι, hot springs, from θέρμη, heat, from θερμός, hot, warm, from θέρω, to warm, make hot.] Of, or pertaining to, heat; warm; as, thermal waters. “The thermal condition of the earth.” J. D. Forbes.