(organic chemistry) any of the 366,319 isomers of the aliphatic hydrocarbon having the chemical formula C₂₀H₄₂, but especially n-eicosane CH₃(CH₂)₁₈CH₃

A suburban village in the Metropolitan Borough of Wirral, Merseyside, England (OS grid ref SJ3484).

A belladonna derivative used as a muscarinic antagonist.

A point which serves as a reference or base for the measurement of other quantities.