2. Pertaining to, or traversed in, six hours, or in half the time between the rising and setting of a heavenly body; as, a semidiurnal arc. [1913 Webster]
The Collaborative International Dictionary of English. 2000.
semidiurnal — [sem΄idī ʉr′nəl] adj. 1. of, lasting, or performed in half a day 2. occurring twice a day, as the tides … English World dictionary
semidiurnal — adjective Date: 1594 1. relating to or accomplished in half a day 2. occurring twice a day 3. occurring approximately every half day < the semidiurnal tides > … New Collegiate Dictionary
semidiurnal — | ̷ ̷(ˌ) ̷ ̷ at semi + adjective Etymology: semi + diurnal 1. : relating to or accomplished in half a day 2. : occurring twice a day 3. : occurring approximately every half day the semidiurnal tides * * * … Useful english dictionary
semidiurnal — /sem ee duy err nl, sem uy /, adj. 1. pertaining to, consisting of, or accomplished in half a day. 2. occurring every 12 hours or twice each day. [1585 95; SEMI + DIURNAL] * * * … Universalium
semidiurnal — adjective Twice daily … Wiktionary
semidiurnal — adj. lasting half a day; happening about once every twelve hours … English contemporary dictionary
semidiurnal — semi·diurnal … English syllables
semidiurnal — sem•i•di•ur•nal [[t]ˌsɛm i daɪˈɜr nl, ˌsɛm aɪ [/t]] adj. 1) pertaining to, consisting of, or accomplished in half a day 2) occurring every 12 hours or twice each day • Etymology: 1585–95 … From formal English to slang
semidiurnal — /ˌsɛmidaɪˈɜnəl/ (say .semeeduy ernuhl) adjective 1. relating to, consisting of, or accomplished in half a day. 2. occurring every twelve hours …
semidiurnal tide — a tide with two high and two low waters in a tidal day with comparatively little diurnal tide inequality. The commonest type of tide … Dictionary of ichthyology
