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tangent

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tangent

Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++
Related topics: Maths
tan·gent /ˈtændʒənt/ noun [countable]  1 go off at a tangent British English, go off on a tangent American English informalTHINK/HAVE THE OPINION THAT to suddenly start thinking or talking about a subject that is only slightly related, or not related at all, to the original subject 突然离开原来的思路;突然离题 Let’s stay with the topic and not go off at a tangent. 我们还是继续讨论正题吧,不要离题。2. technicalHM a straight line that touches the outside of a curve but does not cut across it 切线
Examples from the Corpus
tangentNever quite abstract, never entirely candid, always at a tangent to the world, Hodgkin is a strangely opaque painter.After all, tangents are extremely valuable for your writing.Within the box it is possible to describe slopes and turns as numerical ratios, as tangents.As for going off at tangents, my dear, I do it myself, hormone balance not withstanding.All along the way, short tangents beckoned.
Origin tangent (1500-1600) Latin present participle of tangere; → TANGIBLE
tan·gent nounChineseSyllable
a or to thinking about suddenly talking Corpus subject start


tangent
tangent /ˈtændʒənt/ noun [countable]
 Date: 1500-1600
 Language: Latin
 Origin: present participle of tangere; tangible
1. go off at a tangent British English, go off on a tangent American English informal to suddenly start thinking or talking about a subject that is only slightly related, or not related at all, to the original subject:
    Let’s stay with the topic and not go off at a tangent.
2. technical a straight line that touches the outside of a curve but does not cut across it


tan·gentBrE /ˈtændʒənt/ 🔊NAmE /ˈtændʒənt/ 🔊 noun
(geometry 几何) a straight line that touches the outside of a curve but does not cross it 切线
(abbreviation tan) (mathematics 数学) the ratio of the length of the side opposite an angle in a right-angled triangle to the length of the side next to it 正切   compare cosine, sine
fly/go off at a ˈtangent(BrE) (NAmE go off on a ˈtangent) (informal) to suddenly start saying or doing sth that does not seem to be connected to what has gone before 突然转换话题;突然改变行动