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单词 octad
释义

WordReference Random House Unabridged Dictionary of American English © 2024
oc•tad  (ok′tad),USA pronunciation n. 
  1. Mathematicsa group or series of eight.
  2. Chemistryan element, atom, or group having a valence of eight.
  • Greek oktad- (stem of oktás) group of eight, equivalent. to okt- oct- + -ad -ad1
  • 1835–45
oc•tad′ic, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::
octad /ˈɒktæd/ n
  1. a group or series of eight
  2. an element or group with a valency of eight
Etymology: 19th Century: from Greek oktās, from oktō eight

ocˈtadic adj
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更新时间：2025/7/23 17:41:43