| 单词 |
heptad |
| 释义 |
heptad|ˈhɛptæd|
[ad. Gr. ἑπτάς, ἑπταδ-, the number seven collectively.]
1. The sum or number of seven; a group of seven.
1660Stanley Hist. Philos. ix. (1701) 383/2 The Heptad was so called, qu. σεπτὰς σεβασµοῦ ἄξιος worthy of veneration. 1797Monthly Mag. III. 521 The heptad of wandering animals. 1850J. Brown Disc. Our Lord (1852) I. iv. 351 This prayer contains a sacred heptad of petitions.
b. spec. A group of seven days, a week; = hebdomad.
1876tr. Keil & Delitzsch's Ezek. II. 336 A feast of heptads of days or weeks of days. 1881Blackie Lay Serm. ii. 83 The months are divided into heptads.
2. Chem. An atom or molecule whose equivalence is seven atoms of hydrogen, i.e. which can be combined with, substituted for, or replaced by seven atoms of hydrogen.
3. Mus. A scheme of seven tones in the duodenal system of analysis, containing all the notes from which consonant triads may be formed with the tonic.
1874A. J. Ellis in Proc. R. Soc. XXIII. 11 The Harmonic Heptad or Unit of Chord-relationship..The heptad also contains all triads, consisting of three tones, two of which are consonant with C but dissonant with each other. |
英语词典包含277258条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。
相关内容：
相关热词搜索：heptad英英词典英英释义英语词汇意思用法释义英语
单词 heptadecad 释义 heptadecad Mus.|hptdkd|[f. hepta- + decad.]A scheme of twenty-four to......