octave

n. 八音度, 低八度音, 高八度音
【电】 八音度

形容词:octaval 

oc.tave

n.（名词）
Music
【音乐】
The interval of eight diatonic degrees between two tones, one of which has twice as many vibrations per second as the other.
八度音程：两个音程之间有八个音度的间隔，其中一个每秒的振动是另一个的两倍
A tone that is eight full tones above or below another given tone.
八度音：一个正好比已知音高八度或低八度的音
Two tones eight diatonic degrees apart that are sounded together.
八度和音：两个相差八度的音的和声组合
The consonance that results when two tones eight diatonic degrees apart are sounded.
出两个相距八度的音发音时所产生的和音
A series of tones included within this interval or the keys of an instrument that produce such a series.
八度音阶：在此间隔中包含的一系列音或发出这些音的乐器键
An organ stop that produces tones an octave above those usually produced by the keys played.
八度音栓：风琴上能发出高于这一主音正常音高八度的音栓
The interval between any two frequencies having a ratio of 2 to .
倍频程：频率比率为2比的两个频率的间隔
Ecclesiastical
【基督教会】
The eighth day after a feast day, counting the feast day as one.
第八天：教会节日后从该日算起的第八天
The entire period between a feast day and the eighth day following it.
从节日算起的八天周期
A group or series of eight.
八个一组或一个系列


A group of eight lines of poetry, especially the first eight lines of a Petrarchan sonnet.Also called octet
前八行诗：诗歌中一组八行，尤指彼得拉克十四行诗中的前八行也作 octet
A poem or stanza containing eight lines.
八行诗：含有八行的一首诗或诗节
Sports A rotating parry in fencing.
【体育运动】 第八姿势：击剑中一种轮流的闪避

来源：
Middle English [eighth day after a feast day]
中古英语 [节日后第八天]
from Old French
源自 古法语
from Medieval Latin oct3va (diôs)
源自 中世纪拉丁语 oct3va (diôs)
from Latin [feminine of] oct3vus [eighth]
源自 拉丁语 [] oct3vus的阴性词 [第八]
from octô [eight] * see oktô(u)
源自 octô [八] *参见 oktô(u)

【引伸】
octa.val