| 释义 |
bimedial, a. (and n.)|baɪˈmiːdɪəl|
[f. bi- prefix2 + medial, f. L. medi-us middle.]
†a. Algebra. (See quot. 1557.) Obs.
b. Geom. The sum of two medial lines; a medial line being the geometric mean between two incommensurable lines, which have commensurable squares.
1557Recorde Whetst. P p iv, The nombers that be compounde with +, be called Bimedialles..And if the Bimedialles haue all their nombers and partes of one denominations, then bee thei called onely by their general name Bimedialles. But if their partes be of 2 denominations, then are thei named Binomialles properly. Howbeit, many vse to call Binomialles all compounde nombers that haue +. 1570Billingsley Euclid x. lxvii. 278 A line commensurable in length to a bimediall line, is also a bimediall lyne and of the selfe same order. 1727Chambers Cycl. s.v. Bimedial, When two medial lines, as AB and BC, commensurable only in power, and containing a rational rectangle, are compounded; the whole AC shall be irrational, and is called a first bimedial line. [So in later Encycl.] |