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retract
retractile
retraction
retractor
retrain
retraining
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retinoid
ret·in·oid [ rétt'n oyd ] (plural retinoids)


noun 
Definition:
 
substance related to vitamin A: a vitamin A-related compound that promotes DNA transcription. Use: treatment of acne, aging skin, psoriasis, skin cancers.
[Late 20th century. <retinol]
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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