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Webster 1913 Edition

Adj.

Noun.

from

Varying hare

(Zool.)

any hare or rabbit which becomes white in winter, especially the common hare of the Northern United States and Canada.

ppr.

Altering; changing; deviating.

varying

varying ‎(plural varyings)

(computer graphics) A kind of variable, used by a fragment shader, that interpolates values across a primitive, so as to produce gradient effects etc.
- 2012, Patrick Cozzi, Christophe Riccio, OpenGL Insights
  Another consideration to the relationship between vertex and fragment shaders is that adding too many additional varyings can be a drag on performance since they must all be interpolated […]