hypereutectoid

or hy·per·eu·tec·tic

[ hahy-per-yoo-tek-toid ]
/ ˌhaɪ pər yʊˈtɛk tɔɪd /

adjective Metallurgy.

(of an alloy) having more of the alloying element than the eutectoid composition.
(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. 2020