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murky
Murmansk
murmur
murmuration
murmurings
Murphy
Murphy bed
Murphy game
Murphy’s Law
murragh
murrain
Murray
Murray Bridge
Murray cod
murre
murrelet
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murein
mu·re·in [ myree in, myreen ] (plural mu·re·ins)


noun 
Definition:
 
biochemistry 
Same as  peptidoglycan
[Mid-20th century. < Latin murus "wall" after protein; from its forming the walls of cells]
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