1) Chemical group 2) Containing a propyl group 3) Group 4) Propyl group 5) Propyl radical 6) Radical 7) Type of alcohol 
In organic chemistry, propyl is a linear three-carbon alkyl substituent with chemical formula -C3H7. It is the substituent form obtained by removing one hydrogen atom attached to the terminal carbon of propane. A propyl substituent is often represented in organic chemistry with the symbol Pr (not to be confused with the element praseodymium). Ther...
• (n.) The hypothetical radical C3H7, regarded as the essential residue of propane and related compounds.
(pro´pәl) the univalent radical CH3CH2CH2sbond, from propane.
Pro'pyl noun [ Prop ionic + - yl .] (Chemistry) The hypothetical radical C 3 H 7 , regarded as the essential residue of propane and related compounds. 
(Pr) Type: Term Pronunciation: prō′pil Definitions: 1. The alkyl radical of propane, CH3CH2CH2-.
[n] - the monovalent organic group C3H7- obtained from propane
propyl group noun the monovalent organic group C3H7- obtained from propane
containing a propyl group.