zodiac constellation, late Old English, from Latin leo "lion" (see lion). Meaning "person born under the sign of Leo" is from 1894. Leonid "meteor which appears to radiate from Leo" is from 1868; the annual shower peaks Nov. 14 and the stars fall in extreme profusion about every 33 years. The meteors are believed now to be associated with comet Tempel–Tuttle. The dim constellation Leo Minor was introduced 1690 by Hevelius.