re·place·ment

[ri-pleys-muhnt]
noun
1.
the act of replacing.
2.
a person or thing that replaces another: summer replacements for vacationing staff; a replacement for a broken dish.
3.
Military. a sailor, soldier, or airman assigned to fill a vacancy in a military unit.
4.
Also called metasomatism. Geology. the process of practically simultaneous removal and deposition by which a new mineral grows in the body of an old one.

Origin:
1780–90; replace + -ment

non·re·place·ment, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To replacement
00:10
Replacement is always a great word to know.
So is ort. Does it mean:
a scrap or morsel of food left at a meal.
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
replacement (rɪˈpleɪsmənt) [Click for IPA pronunciation guide]
 
n
1.  the act or process of replacing
2.  a person or thing that replaces another
3.  geology the growth of a mineral within another of different chemical composition by gradual simultaneous deposition and removal
4.  Also called: petrification a process of fossilization by gradual substitution of mineral matter for the original organic matter

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
Hip joint replacement is surgery to replace all or part of the hip joint with
  an artificial joint.
In other words, ignorance is not an adequate replacement for prejudice.
For the better-off the replacement ratio was lower, but they can cope.
On the space station, everything is geared toward easy replacement.
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