octad

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the cardinal number that is the sum of seven and one
• Syn:
eight, 8, VIII, eighter, eighter from Decatur,
ogdoad, octonary, octet
• Hypernyms:
digit, figure

• Từ đồng nghĩa / Synonyms:
  eight, 8, VIII, eighter, eighter from Decatur, ogdoad, octonary, octet