octad

名词 octad:

1. the cardinal number that is the sum of seven and one
   同义词：eight, 8, VIII, eighter, eighter from Decatur, ogdoad, octonary, octet

oc.tad

n.（名词）
A group or sequence of eight.
八个一组或一列

来源：
Greek oktas oktad-
希腊语 oktas oktad-
from oktô [eight] * see oktô(u)
源自 oktô [八] *参见 oktô(u)

【引伸】
octad.ic
adj.（形容词）