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protostome
prototherian
prototrophic
prototype
protoxide
protozoan
protozoology
protozoon
protract
protracted
protractile
protraction
protractor
protrude
protrusile
protrusion
protrusive
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protract

pro·tract [ prō trákt, prə trákt ] (past and past participle pro·tract·ed, present participle pro·tract·ing, 3rd person present singular pro·tracts)


transitive verb 
Definition:
 
1. make something last: to make something last longer

2. physiology extend body part: to extend or lengthen a body part

3. mathematics plot and draw lines: to plot lines and draw them using a scale and protractor

[Mid-16th century. < Latin protract-, past participle of protrahere< trahere "draw"]

pro·trac·tive adjective
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