Definition of centrolinead in US English:

centrolinead

noun

rare, historical
  • An instrument used to facilitate the drawing of lines in a perspective drawing, consisting of three rulers joined together in such a way that the centrally located ruler, along which lines are to be drawn, may be orientated correctly by adjusting the position of the other two.

Origin

Early 19th century; earliest use found in Peter Nicholson (1765–1844), architectural writer and mathematician.

Pronunciation

centrolinead

/ˌsɛntrə(ʊ)ˈlɪnɪad/