Plural of cresyl; the plural form referring to multiple cresol-related chemical radicals or compounds.
Cresyl comes from cresol (from creosote and methyl) with the -yl suffix indicating a chemical radical. The plural adds standard English -s.
In chemistry, the -yl suffix marks a radical—essentially a molecular fragment that acts as a unit—so cresyls are fragments of cresol molecules that can bond to other compounds.
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