officer of the day

officer of the day

noun Military.
an officer who has charge of the guard and prisoners on an assigned day at a military installation. Abbreviation: OD, O.D., O.O.D.

Origin:
1835–45
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Officer of the day is always a great word to know.
So is bezoar. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Collins
World English Dictionary
officer of the day
 
n
Also called: orderly officer a military officer whose duty is to take charge of the security of the unit or camp for a day

Collins English Dictionary - Complete & Unabridged 10th Edition
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