lipids

lip·id   (lĭp'ĭd, lī'pĭd)    n.  Any of a group of organic compounds, including the fats, oils, waxes, sterols, and triglycerides, that are insoluble in water but soluble in nonpolar organic solvents, are oily to the touch, and together with carbohydrates and proteins constitute the principal structural material of living cells. [French lipide : Greek lipos, fat; see lipo- + French -ide, -ide.] lip·id'ic adj.

lipids [(lip-idz, leye-pidz)]

A group of organic molecules that includes fats, oils, and waxes. Lipids do not dissolve in water. In animals, including humans, lipids store energy and form parts of cell structures, such as cell membranes.

lipid 

Main Entry: lip·id
Pronunciation: 'lip-&d
Variant: also lip·ide /-"Id/
Function: noun
: any of varioussubstances that are soluble in nonpolar organic solvents (as chloroform and ether), that with proteins and carbohydrates constitute the principal structural components of living cells, and that includefats, waxes, phospholipids, cerebrosides, and related and derived compounds

lipid lip·id (lĭp'ĭd, lī'pĭd) or lip·ide (lĭp'īd', lī'pīd')
n.
Any of a group of organic compounds, including the fats, oils, waxes, sterols, and triglycerides, that are insoluble in water but soluble in common organic solvents, are oily to the touch, and together with carbohydrates and proteins constitute the principal structural material of living cells.

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lip·id'ic adj.

lipid   (lĭp'ĭd)  Pronunciation Key  Any of a large group of organic compounds that are oily to the touch and insoluble in water. Lipids include fatty acids, oils, waxes, sterols, and triglycerides. They are a source of stored energy and are a component of cell membranes.