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helix British & World English

An object having a three-dimensional shape like that of a wire wound uniformly in a single layer around a cylinder or cone, as in a corkscrew or spiral staircase

double helix British & World English

A pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule

H. helix in ivy British & World English

A woody evergreen Eurasian climbing plant, typically having shiny, dark green five-pointed leaves

Helix pomatia in edible snail British & World English

A large snail which is widely collected or cultured for food, occurring chiefly in southern Europe

Helix aspersa in garden snail British & World English

A large European snail with a brownish shell, often abundant in gardens