3H

noun

A grade of pencil with lead that makes lighter marks than a pencil grade 2H but darker marks than a pencil of grade 4H; a pencil with hard lead.

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Meanings

noun3H (usually uncountable, plural 3Hs)

plural 3Hs

  1. BritishEnglishuncountableusuallyA grade of pencil with lead that makes lighter marks than a pencil grade 2H but darker marks than a pencil of grade 4H; a pencil with hard lead.
  2. uncountableusuallyA pencil of grade 3H.
  3. uncountableusuallytritium. In this case, the "3" should be superscripted: ³H.
Cite this entry
APA

3H. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/3H

MLA

“3H.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/3H. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “3H,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/3H.

Source: 3H on Wiktionary, CC BY-SA 4.0.