"You canker blossom!" 3 Shakespearean Insults

open cover

noun, Mathematics
a cover of a set consisting entirely of open sets. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for open cover
  • open cover will not fully close without use of key, permitting custodian to tell at a glance whether unit is open or locked.

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