Meaning of barycentric coordinate system

bar•y•cen'tric coor'dinate sys"tem

Pronunciation: (bar"u-sen'trik), [key]
— Math. Math.
  1. a coordinate system for an n-dimensional Euclidean space in which each point is represented by n constants whose sum is 1 and whose product with a given set of linearly independent points equals the point.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.