A tricglyceride is a glyceride occurring naturally in animal and vegetable tissues; it consists of the esters of three fatty acids on a glycerin "backbone".
Its chemical structure looks like this:
H2C - O - CO - R1
|
HC - O - CO - R2
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H2C - O - CO - R3
Here, each of the R parts is a hydrocarbon tail (possibly with side branches or double bonds). A triglyceride is made by combining glycerine with fatty acid. Glycerine looks like this:
H2C - OH
|
HC - OH
|
H2C - OH
and a fatty acid is like this:
R - COOH
triglycerid
When 3 fatty acids are attached to a glycerol backbone.