See Also: axis, principal(medicine)
principal optic axis(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Medicine Lodge Memorial Hospital- Medicine Lodge(health)
Orthomolecular medicine (orthomolecular nutritional medicine, orthomolecular therapy)(health)
Principal(law)
Principal(finance)
principal(dictionary)
Principal only (PO)(finance)
principal boy(dictionary)
axis, principal (medicine)
axis, principal
<microscopy> A line conceived as passing through the centre of a lens to connect the centres of curvature of the lens surfaces. The focal points of a lens lie on the principal axis.
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