1816, from gravitation + -al (1). Related: Gravitationally.
1640s in physics, "force that gives weight to objects," also figurative, "act of tending toward a center of attraction," from Modern Latin gravitare (see gravitate). Compare gravity.
suffix forming adjectives from nouns or other adjectives, "of, like, related to, pertaining to," Middle English -al, -el, from French or directly from Latin -alis (see -al (2)).
updated on April 16, 2015