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HADAR

A bright white star in the constellation Cen

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HADE

The angle of inclination of a fault-plane, measured from the vertical.

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HADLEY CELL

A meridional circulation of the atmo

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HADROM, HADROME

1 The conducting elements and associated parenchyma in xylem tissue. Cf leptom. 2 The hydroids of mosses,

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HADRON

An elementary particle that interacts with other particles via the strong interaction. Hadrons include baryons and mesons.

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HAEM

A complex iron containing organic compound which, in combination with the protein globin, forms haemoglobin and which gives it its oxygen carrying ca

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HAEM-, HAEMAT-, HAEMATO-, HAEMO-

Prefixes from Gk haima, -atos denoting blood. US hem-, hemat-, hemato-, hemo-.

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HAEMAD

Situated on the same side of the vertebral column as the heart,

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HAEMAGGLUTININ

A substance which agglutinates red blood cells. This may be a specific antibody, or a lectin, or a component of certain viruses eg influenza or measles by which they bind to cell surfaces,

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HAEMAL

Pertaining to the blood or to blood vessels. Also haematal, haemic.

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