from
The Collaborative International Dictionary of English v.0.48
acrylic \a*cryl"ic\ ([.a]*kr[i^]l"[i^]k), a.
1. (Chem.) Of or containing acryl, the hypothetical radical
({R.CH:CH.CO-}) of which acrolein ({H2C:CH.CHO}) is the
hydride; as, acrylic acid. The characteristic residue in
an acrylic compound is the carbonyl group attached
directly to an ethylenic carbon.
[1913 Webster +PJC]
2. Of or pertaining to a derivative of acrylic acid, or an
object consisting mostly of an {acrylic resin}; as, an
acrylic window.
[PJC]