(organic chemistry) The divalent radical CH₃-CH₂-CH< analogous to ethylidene; propylidene / (organic chemistry) The pesticide butan-2-yl 2-(2-hydroxyethyl)piperidine-1-carboxylate

(medicine) epidemiology based on the distribution of blood serum antibodies

plural of Jack-a-Lent

Resembling or characteristic of a diner.