Cantalever \Can"ta*lev`er\, n. [Cant an external angle + lever a
supporter of the roof timber of a house.]
[Written also
cantaliver and cantilever.]
1. (Arch.) A bracket to support a balcony, a cornice, or the
like.
[1913 Webster]
2. (Engin.) A projecting beam, truss, or bridge unsupported at the outer end; one which overhangs. [1913 Webster]
Cantalever bridge, a bridge in which the principle of the cantalever is applied. It is usually a trussed bridge, composed of two portions reaching out from opposite banks, and supported near the middle of their own length on piers which they overhang, thus forming cantalevers which meet over the space to be spanned or sustain a third portion, to complete the connection. [1913 Webster]
Cantilever \Can"ti*lev`er\, n. Same as Cantalever. [1913 Webster]
cantilever
noun1: projecting horizontal beam fixed at one end only
verb
1: project as a cantilever
2: construct with girders and beams such that only one end is fixed; "Frank Lloyd Wright liked to cantilever his buildings"
Define Cantilever and 150,000 other terms at dictionary.net