词族 · subtend
中文词源
subtend 对向弧，对向角
sub-,在下，向上，-tend,延展，词源同 tend,extend.用于几何学术语指对向弧，对向角。
英语词源
- subtend (v.)
- 1560s, from Latin subtendere "to stretch underneath," from sub "under" (see sub-) + tendere "to stretch" (see tenet). Related: Subtended; subtending.
权威例句
- 1. In the daisy family the numerous bracts which subtend the inflorescence are known as an involucre.
- 在菊科植物中,苞片数目多而聚生在花序外围,称为总苞.