There are 2 main definitions of Hb in English:

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Hb1

Syllabification: Hb

symbol

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There are 2 main definitions of Hb in English:

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HB2

Syllabification: HB

abbreviation

1Half board.
1.1 (also hb) Hardback.
1.2Hard black (used in describing a medium grade of pencil lead).
1.3The political wing of the Basque separatist organization ETA.
[abbreviation of Basque Herri Batasuna 'United People']

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