(chemistry) any of a large class of organic compounds, of plant origin, having more than one phenol group; they tend to be colourful and to have antioxidant properties

(chemistry) Describing a rearrangement reaction in which a group, along with its electron pair, moves from one atom to another.

A fish of any of the species in the family Halosauridae, deep-sea eel-like fish.

(biochemistry) An endogenous opioid peptide neurotransmitter found naturally in the brains of many animals, including humans; one of the two forms of enkephalin (the other being metenkephalin).