Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Mental \Men"tal\, a. [F., fr. L. mentalis, fr. mens, mentis, the mind; akin to E. mind. See Mind.] Of or pertaining to the mind; intellectual; as, mental faculties; mental operations, conditions, or exercise.
What a mental power
This eye shoots forth!
--Shak.
Mental alienation, insanity.
Mental arithmetic, the art or practice of solving arithmetical problems by mental processes, unassisted by written figures.
Usage examples of "mental arithmetic".
It reminded her of an idiot savant, one of those people who might be grossly deficient in ordinary social or verbal skills but who could perform mind- boggling feats of mental arithmetic -- such as figuring out, after a moment's thought, on what day of the week June first in the year 11,977 will fall.
It reminded her of an idiot savant, one of those people who might be grossly deficient in ordinary social or verbal skills but who could perform mind- boggling feats of mental arithmetic--such as figuring out, after a moment's thought, on what day of the week June first in the year 11,977 will fall.
He did the mental arithmetic and decided that they'd be in Virginia around nine or ten in the evening.
Jason's voice grew fainter and Tom knew that he was doing some mental arithmetic as he thought out loud.
Ross did a little fast mental arithmetic concerning the distance of the moon from the earth, rounding the figure off to 240,000 miles.