| 单词 |
non-directional |
| 释义 |
non-diˈrectional, a. (n.)
[non- 3.]
Lacking directional properties; esp. equally sensitive, intense, or the like, in all directions. † Also as n.
1903Nature 22 Oct. 610/1 In Prof. Henrici's algebra the products of two vectors α, β are:—(αβ) a non-directional or ‘scalar’,..and [αβ] a vector perpendicular to the plane drawn through α and β. 1931Proc. IRE XIX. 1754 When the noise comes from more than one direction the effects produced by sunrise or sunset upon the noise intensity as received on a nondirectional antenna become somewhat involved. 1946H. Jacob On Choice of Common Language iii. 107 In addition to the primarily spatial directives, for, of, and till are used on the same analogy, as non-directional prepositions. 1964Oceanogr. & Marine Biol. II. 448 The usual response of untrained fish in aquaria to non-directional sounds is one of non-orientated quickened swimming, often momentary. 1967E. Short Embroidery & Fabric Collage iii. 59 This non-directional type of design is important in an article which may be carelessly thrown down. |
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