There are 2 definitions of Hb in English:

Hb1

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symbol

Haemoglobin: your Hb level will be tested early in pregnancy

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Word of the day humoresque
Pronunciation: ˌhjuːməˈrɛsk
noun
a short, lively piece of music

There are 2 definitions of Hb in English:

HB2

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abbreviation

1Half board: twin rooms with facilities on an HB basis
1.1 (also hb) Hardback: £12.99 hb/£8.99 pb
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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