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radius
radius of action
radius of curvature
radius vector
radix
RADM
radome
radon
radula
radwaste
RAEC
RAF
RAFDS
raffia
raffia palm
raffinate
raffinose
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radula

rad·u·la [ rájjələ ] (plural rad·u·lae [ rájjəlee ] or rad·u·las)


noun 
Definition:
 
part of mollusk's mouth: a band of tissue in the mouth of some mollusks gastropods containing rows of small teeth, used in scraping off particles of food and bringing them into the mouth

[Mid-18th century. < Latin, "scraper" < radere "scrape"]

rad·u·lar adjective
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