📒 the flat part of a knife, tool or machine, which has a sharp edge or edges for cutting
📒 one of the flat parts that turn around in an engine or on a helicopter
📒 the flat wide part of an oar (= one of the long straight pieces of wood that are used to row a boat) that goes in the water
📒 a single flat leaf of grass
📒 the flat metal part on the bottom of an ice skate