tangent的词源

英文词源

tangent (adj.)

1590s, "meeting at a point without intersecting," from Latin tangentem (nominative tangens), present participle of tangere "to touch," from PIE root *tag- "to touch, to handle; border on; taste, partake of; strike, hit;" figuratively "affect, impress; trick, cheat; mention, speak of" (cognates: Latin tactus "touch;" Greek tassein "to arrange," tetagon "having seized;" Old English þaccian "stroke, strike gently"). First used by Danish mathematician Thomas Fincke in "Geomietria Rotundi" (1583). Extended sense of "slightly connected with a subject" is first recorded 1825. Related: Tangence; tangency.

tangent (n.)

1590s as a geometric function, from tangent (adj.). From 1650s as "a tangent line." Figurative use of off on a tangent is from 1771.

中文词源

tangent：(数)正切，相切，切线 

词根词缀： -tang-接触 + -ent名词词尾

该词的英语词源请访问找单词词源英文版：tangent 词源，tangent 含义。

tangent：正切，切线

来自拉丁语 tangere,接触，触摸，来自 PIE*tag,接触，触摸，安排，词源同 integer,contact.后 用于数学术语指正切，切线。

tangent：正切，切线

来自拉丁语 tangere,接触，触摸，来自 PIE*tag,接触，触摸，安排，词源同 integer,contact.后 用于数学术语指正切，切线。