4H (English, noun)
expansion: 4H (usually uncountable, plural 4Hs)
Senses:
glosses: A grade of pencil with lead that makes lighter marks than a pencil grade 3H but darker marks than a pencil of grade 5H; a pencil with very hard lead.
tags: British
English
uncountable
usually
glosses: A pencil of grade 4H.
tags: uncountable
usually
Forms:
form: 4Hs
tags: plural