/ ˈæsɪteɪt; NAmE / noun
1.
[ U ] a chemical made from acetic acid , used in making plastics, etc.
2.
[ U ] a chemical used to make fibres which are used to make clothes, etc.
3.
[ C ] a transparent plastic sheet that you can write or print sth on and show on a screen using an overhead projector
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WORD ORIGIN
late 18th cent.: from acetic acid + -ate .