HYPERBOLIC; HYPERBOLICAL a.
h.), certain functions which have relations to the hyperbola corresponding to those which sines, cosines, tangents, etc., have to the circle; and hence, called hyperbolic sines, hyperbolic cosines, etc. -- Hyperbolic logarithm. See Logarithm. -- Hyperbolic spiral (Math.), a spiral curve, the law of which is, that the…
INCOME n.
That gain which proceeds from labor, business, property, or capital of any kind, as the produce of a farm, the rent of houses, the proceeds of professional business, the profits of commerce or of occupation, or the interest of money or stock in funds, etc.; revenue; receipts; salary; especially, the annual receipts of…
INCONVENIENCE n.
That which gives trouble, embarrassment, or uneasiness; disadvantage; anything that disturbs quiet, impedes prosperity, or increases the difficulty of action or success; as, one inconvenience of life is poverty. A place upon the top of Mount Athos above all clouds of rain, or other inconvenience. Sir W. Raleigh. Man is…
INCONVENIENT a.
Not convenient; giving trouble, uneasiness, or annoyance; hindering progress or success; uncomfortable; disadvantageous; incommodious; inopportune; as, an inconvenient house, garment, arrangement, or time.
INDEX n.
ex of refraction, or Refractive index (Opt.), the number which expresses the ratio of the sine of the angle of incidence to the sine of the angle of refraction. Thus the index of refraction for sulphur is 2, because, when light passes out of air into sulphur, the sine of the angle of incidence is double the sine of the…