- p. gallate an antioxidant for emulsions.
- p. hydroxybenzoate SYN: propylparaben.
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pro·pyl 'prō-pəl n either of two isomeric alkyl groups C3H7 derived from propane often used in combination
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pro·pyl (proґpəl) the univalent chemical radical, CH3CH2CH2, from propane.Medical dictionary. 2011.