Tm

symbol

the chemical element thulium.

abbreviation

Transcendental Meditation.

noun, symbol

the chemical element of atomic number 69, a soft silvery-white metal of the lanthanide series.

late 19th century: modern Latin, from Latin Thule (see Thule (sense 1)), from Greek Thoulē, of unknown origin.

noun

a technique for detaching oneself from anxiety and promoting harmony and self-realization by meditation, repetition of a mantra, and other yogic practices, promulgated by an international organization founded by the Indian guru Maharishi Mahesh Yogi ( c. 1911–2008).