| Young's rule | An obsolete rule to determine a child's dose: 12 is added to the child's age and the sum is divided by the age; the adult dose divided by the figure so obtained gives the proper dose. (05 Mar 2000) |
|---|---|
| Young, Hugh | <person> U.S. Urologist, 1870-1945. See: Young prostatic tractor. (05 Mar 2000) |
| Young, Thomas | <person> English physician and physicist, 1773-1829. See: Young's modulus, Young's rule, Young-Helmholtz theory of colour vision. (05 Mar 2000) |
| Young, William | <person> 20th century Australian biochemist. See: Harden-Young ester. (05 Mar 2000) |
| Young-Helmholtz theory of colour vision | A theory that there are three colour-perceiving elements in the retina: red, green, and blue. Perception of other colours arises from the combined stimulation of these elements; deficiency or absence of any one of these elements results in inability to perceive that colour and a misperception of any other colour of which it forms a part. Synonym: Helmholtz theory of colour vision. (05 Mar 2000) |
| youngth | Youth. "Youngth is a bubble blown up with breath." (Spenser) Source: Websters Dictionary (01 Mar 1998) |
| youpon | <botany> Same as Yaupon. Source: Websters Dictionary (01 Mar 1998) |
| youth | The time between childhood and maturity. (unfortunately, as the songwriter sammy cahn noted, youth is wasted on the young. ) (12 Dec 1998) |
| youthful | 1. Not yet mature or aged; young. "Two youthful knights." Also used figuratively. "The youthful season of the year." 2. Of or pertaining to the early part of life; suitable to early life; as, youthful days; youthful sports. "Warm, youthful blood." "Youthful thoughts." 3. Fresh; vigorous, as in youth. Synonym: puerile, juvenile. Youthful, Puerile, Juvenile. Puerile is always used in a bad sense, or at least in the sense of what is suitable to a boy only; as, puerile objections, puerile amusements, etc. Juvenile is sometimes taken in a bad sense, as when speaking of youth in contrast with manhood; as, juvenile tricks; a juvenile performance. Youthful is commonly employed in a good sense; as, youthful aspirations; or at least by way of extenuating; as, youthful indiscretions. "Some men, imagining themselves possessed with a divine fury, often fall into toys and trifles, which are only puerilities." "Raw, juvenile writers imagine that, by pouring forth figures often, they render their compositions warm and animated." Youth"fully, Youth"fulness. Source: Websters Dictionary (01 Mar 1998) |
| youze | <zoology> The cheetah. Origin: From a native East Indian name. Source: Websters Dictionary (01 Mar 1998) |
| yowe | <zoology> A ewe. See: Ewe. Source: Websters Dictionary (01 Mar 1998) |
| yowley | <zoology> The European yellow-hammer. Origin: Cf. Yellow. Source: Websters Dictionary (01 Mar 1998) |
| ypsiliform | <biology> Resembling the in appearance; said of the germinal spot in the ripe egg at one of the stages of fecundation. Origin: Gr. The name of the letter. Source: Websters Dictionary (01 Mar 1998) |
| ypsiloid | <anatomy> In the form of the letter Y; Y-shaped. Source: Websters Dictionary (01 Mar 1998) |
| YPT1 protein geranylgeranyltransferase | <enzyme> Modifies saccharomyces cerevisiae secretory GTPase protein ypt1 Registry number: EC 2.5.1.- Synonym: geranylgeranyltransferase ypt1 protein, ggtase II (26 Jun 1999) |