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单词 tetrad
释义

WordReference Random House Unabridged Dictionary of American English © 2024
tet•rad  (te′trad),USA pronunciation n. 
  1. a group of four.
  2. the number four.
  3. [Cell Biol.]a group of four chromatids formed by synapsis at the beginning of meiosis.
  4. Chemistrya tetravalent or quadrivalent element, atom, or group.
  • Greek tetrad- (stem of tetrás) group of four
  • 1645–55

Collins Concise English Dictionary © HarperCollins Publishers::
tetrad /ˈtɛtræd/ n
  1. a group or series of four
Etymology: 17th Century: from Greek tetras, from tettares four
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更新时间：2025/2/23 12:16:47