(initialism) .  (British) A grade of pencil with lead that makes lighter marks than a pencil grade 5H; a pencil with extremely hard lead.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.