sandwich /sandˈwich, -wij/

1. Any sort of food between two slices of bread, said to be named after the fourth Earl of Sandwich (1718–92), who ate a snack of this kind in order not to have to leave the gaming-table
2. Anything in a similar arrangement

1. To lay or place between two layers
2. To fit tightly or squeeze between two others or two of another kind
3. To intercalate

Of the nature of, relating to or resembling, a sandwich or sandwich course

sandwich boards plural noun

A pair of advertising placards worn over the chest and back on shoulder straps by a person employed to walk the streets

sandwich construction noun (aeronautics)

Structural material, consisting of two thin skins either side of a thick core, having an exceptionally high stiffness/weight ratio

sandwich course noun

An educational course consisting of alternating periods of study and paid employment

sandwich man noun

A man who carries a pair of sandwich boards (qv above)

sandwich technique noun (immunology)

A technique for the detection of antibody in histological preparations, involving the sandwiching of an antigen layer between the preparation and a layer of labelled antibody

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