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haematin

noun, biochem a dark bluish or brownish pigment containing iron in the ferric state, obtained by the oxidation of haem

haematoma

noun, pathol a tumour of clotted or partially clotted blood

hand down

verb, to leave to a later period or generation; bequeath

hand in

verb, to return or submit (something, such as an examination paper)

hand on

verb, to pass to the next in a succession

handyman

noun, a man employed to do various tasks