SUPERHARD

Etymology

Adjective

superhard (comparative more superhard, superlative most superhard)

Having a very high hardness.

(not comparable, mineralogy) Having a hardness between that of boron nitride and diamond.

Noun

superhard (plural superhards)

(motorsports) Ellipsis of superhard tyre. (A tyre whose compound is harder than hards, and therefore harder than mediums, softs.)

Source: Wiktionary

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