There are 2 main definitions of Hb in English:

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Hb 1

symbol

Haemoglobin: your Hb level will be tested early in pregnancy

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Line breaks: Hb

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There are 2 main definitions of Hb in English:

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HB 2

abbreviation

1Half board: twin rooms with facilities on an HB basis
2 (also hb) Hardback: £12.99 hb/£8.99 pb
3Hard black (used in describing a medium grade of pencil lead).
4The political wing of the Basque separatist organization ETA.
Abbreviation of Basque Herri Batasuna 'United People'

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Line breaks: HB

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