nine plus two array
noun Cell Biology.
the arrangement of microtubules in a flagellum or cilium, consisting of a ring of nine evenly spaced couplets surrounding two central singlets. Symbol: 9 + 2.
DON’T VACILLATE! VANQUISH THIS WORD OF THE DAY QUIZ!
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020