mortise lock

mortise lock

noun
a lock housed within a mortise in a door or the like, so that the lock mechanism is covered on both sides.

Origin:
1770–80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Mortise lock is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Collins
World English Dictionary
mortise lock
 
n
a lock set into a mortise in a door so that the mechanism of the lock is enclosed by the door

Collins English Dictionary - Complete & Unabridged 10th Edition
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