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hypereutectoid

or hy·per·eu·tec·tic

[hahy-per-yoo-tek-toid]
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adjective Metallurgy.
  1. (of an alloy) having more of the alloying element than the eutectoid composition.
  2. (of steel) having more carbon than the 0.8 percent of eutectoid steel.
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Origin of hypereutectoid

First recorded in 1910–15; hyper- + eutectoid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018