octave
/ˈɒktɪv/noun
1
- Music a series of eight notes occupying the interval between (and including) two notes, one having twice or half the frequency of vibration of the other【乐】八度音阶。
1.1
- the interval between these two notes八度音程。
1.2
- each of the two notes at the extremes of this interval（八度音程中的）首音; 尾音。
1.3
- these two notes sounding together八度和音。
2
- a group or stanza of eight lines; an octet.八行诗节; 八重奏; 八重唱。
3
- the seventh day after a Church festival教会节日后的第七天。
3.1
- a period of eight days beginning with the day of such a festival（从教会节日算起的）八天周期。
4
- Fencing the last of eight parrying positions【剑】（击剑防守姿势的）第八式。
5
- Brit. a wine cask holding an eighth of a pipe〈英〉（容量为八分之一大酒桶的）酒桶。
短语
law of octaves
- Chemistry, historical【化】〈史〉见NEWLANDS.
词源
Middle English (in sense 3)： via Old French from Latin octava dies 'eighth day'.