- Properly, the leaf, or flat part of the leaf, of any plant, especially of gramineous plants. The term is sometimes applied to the spire of grasses."The crimson dulse . . . with its waving blade." [Percival.]"First the blade, then ear, after that the full corn in the ear." [Mark iv. 28.]
- The cutting part of an instrument; as, the blade of a knife or a sword.
- The broad part of an oar; also, one of the projecting arms of a screw propeller.
- The scapula or shoulder blade.
- pl.[Arch] The principal rafters of a roof.
- pl.[Com] The four large shell plates on the sides, and the five large ones of the middle, of the carapace of the sea turtle, which yield the best tortoise shell.
- A sharp-witted, dashing, wild, or reckless, fellow; -- a word of somewhat indefinite meaning."He saw a turnkey in a trice Fetter a troublesome blade." [Coleridge.]
- The flat part of the tongue immediately behind the tip, or point."“Lower blade” implies, of course, the lower instead of the upper surface of the tongue." [H. Sweet.]
Etymology: OE. blade blad, AS. blæd leaf; akin to OS., D., Dan., & Sw. blad, Icel. blað, OHG. blat, G. blatt, and perh. to L. folium, Gr. fy`llon. The root is prob. the same as that of AS. blōwan, E. blow, to blossom. See Blow to blossom, and cf. Foil leaf of metal