(inorganic chemistry) The binary sulfide of ferrous iron, FeS, that occurs in several minerals

Lygodium microphyllum, an Old World tropical fern (also naturalized in Jamaica and Florida) that grows as a vine.

(brewing) A slow alcoholic fermentation process carried out at low temperatures during which the yeast sinks to the bottom of the liquid. Used in brewing lager-type beers.

(botany) A plant of division Pteridospermatophyta, which had fronds like a fern and naked seeds.

(botany) One of the asexual, dustlike spores of a fern which resemble seeds.

A building material made from Portland cement concrete with a matrix of steel bars or wires (rebars) to increase its tensile strength.

(metallurgy) A compound of iron with carbon (Fe₃C).

plural of fertility drug

A drug that improves fertility.

plural of feral child