Relating to carbon-based compounds, biological organisms, or food produced without the use of chemical fertilizers or pesticides

an inorganic acid used for making fertilizers, dyes, medicines, and fireworks; it appears as colorless crystals or a thick liquid and is easily dissolved by water in the air

A type of organic compound formed by the reaction of an alcohol and an acid with the loss of water. Low molecular weight esters are typically fragrant liquids used as solvents or flavorings, while high molecular weight esters are solids or thick liquids found in fats and oils.

kind; type; class; category; group