aliphatic

adj. referring to an oil or fat

In chemistry, aliphatic compounds are organic compounds in which carbon atoms are joined together in straight or branched chains or in rings, that can be either saturated or unsaturated, but not aromatic. The simplest aliphatic compound is methane (CH4). Aliphatics include not only the fatty acids and other derivatives of paraffin hydrocarbons (alkanes), but also unsaturated compounds, including the alkenes (such as ethylene) and the alkynes (such as acetylene). The most frequently found non-carbon atoms bound to the carbon chain include hydrogen, oxygen, nitrogen, sulfur, and various halides.
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Adjective
1. having carbon atoms linked in open chains
(similar) acyclic, open-chain

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Compare with aromatic .An organic compound that does not contain ring structures.

aliphatic /,æli'fætik/
tính từ (hoá học) béoaliphatic compound: hợp chất béo
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