3h

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|British English}} 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.
2. A pencil of grade 3H.
3. [[tritium]]. In this case, the "3" should be superscripted: {{sup|3}}H.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.