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protractile
protraction
protractor
protrude
protrusile
protrusion
protrusive
protuberance
protuberant
protuberate
protyle
proud
proustite
Prov.
prov.
prove
proven
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prototrophic
pro·to·tro·phic [ prtō trṓfik, prtə tróffik ]


adjective 
Definition:
 
needing same nourishment: describes a microorganism that has the same nutritional needs and metabolic characteristics as the wild parent strain

pro·to·troph [ prṓtə trf, prṓtə tròf ] noun
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