See Also: axis, principal(medicine)
principal optic axis(medicine)
Principal(law)
Principal only (PO)(finance)
Principal(money)
Principal-only (PO)(money)
Principal(finance)
principal(dictionary)
principal boy(dictionary)
Principal(medicine)

livery (oh) and axis, principal (medicine)


livery (oh)



[Date: 1300-1400; Language: Old French; Origin: livree 'delivery', from livrer 'to deliver', from Latin liberare; LIBERATE]
[U and C] BrE the colours and designs used by a company on its property and vehicles
[U and C] a special uniform worn by servants in past times
[U] the business of keeping and taking care of horses, especially in past times
::a livery stable
-see also liveried

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.