In biochemistry, "amyl" means "pertaining to starch". Many moderately complex biological chemicals related to starch contain it, for example:-
Note that in this usage, it is a part of the word, and becomes "amylo" when preceding a consonant.
In organic chemistry, amyl is the old trivial name for the alkyl functional group and radical called pentyl under the IUPAC nomenclature: that is, -C5H11. This usage may derive from the presence of amyl alcohol in fusel oil, which is often fermented from starches. In this usage, amyl (normally) remains a separate word and it does not become "amylo-" before a consonant.
Several important amyl/pentyl compounds are still widely known by their older, amyl names, including:
"E-Amyl" is the name of the equivalent drug often sniffed by players of the game Second Life
WIPO PUBLISHES PATENT OF SOLVAY FOR "PROCESS FOR THE MANUFACTURE OF HYDROGEN PEROXIDE" (BELGIAN, BRITISH INVENTORS)
Apr 07, 2012; GENEVA, April 7 -- Publication No. WO/2012/041918 was published on April 5. Title of the invention: "PROCESS FOR THE MANUFACTURE...