Etymology
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-ite (2)
chemical salt suffix, from French -ite, alteration of -ate (see -ate (3)).
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bodiless (adj.)
late 14c., "not consisting of material substance, incorporeal," from body (n.) + -less.
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bi- 
word-forming element meaning "two, having two, twice, double, doubly, twofold, once every two," etc., from Latin bi- "twice, double," from Old Latin dvi- (cognate with Sanskrit dvi-, Greek di-, dis-, Old English twi-, German zwei- "twice, double"), from PIE root *dwo- "two."

Nativized from 16c. Occasionally bin- before vowels; this form originated in French, not Latin, and might be partly based on or influenced by Latin bini "twofold" (see binary). In chemical terms, it denotes two parts or equivalents of the substance referred to. Cognate with twi- and di- (1).
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thickening (n.)
"substance used to thicken something," 1839, verbal noun from thicken.
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allergen (n.)
substance causing allergy, 1912, from allergy on model of antigen.
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match-head (n.)

"piece of some chemical composition with which a match is tipped," 1860, from match (n.1) + head (n.).

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amylase (n.)
enzyme which brings about the hydrolysis of starch, 1885, from amyl + chemical suffix -ase.
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solvent (n.)

"substance able to dissolve other substances," 1670s, from Latin solventem (see solvent (adj.)).

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biosynthesis (n.)
"production of chemical substances by living organisms," 1930; see bio- + synthesis.
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Saran 
U.S. trademark name for PVC used as a cling-film, 1940, by Dow Chemical Company.
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