In photometry, the measure of the power of light as perceived by the human eye, in proportion to the power at each wavelength.

(chemistry) The amount of substance per unit volume, per unit time transformed in a reaction

The light available at a point in the atmosphere, especially that available to produce photochemical processes

(astronomy) The (otherwise unnamed) unit of density of electromagnetic radiation from a radio star, equal to 10⁻²⁶ watts per square meter per hertz

plural of neutron flux

(physics) The number of neutrons passing through something, per unit area per unit time.

plural of magnetic flux

A mixture of potassium carbonate and charcoal, obtained by deflagrating tartar with half its weight of niter.

(archaic) chronic dysentery

(archaic) dysentery