A very hard ceramic tile used e.g. as flooring, usually 1/2 to 3/4 inches (13 to 19 mm) in thickness, made by the extrusion process from natural clays or shales.

(nautical) A light, narrow rowing boat, especially one used in competitive rowing, in which a four rowers each have two oars / (rowing, especially in plural) A race in which such craft participate

(physics) The quantum number that represents the angular momentum of an atomic orbital

(medicine) A unit of measurement, equivalent to one year of life in perfect health, that can be used to decide whether a medical procedure is worthwhile for an individual.

(physics) a quantity lacking dimension, a pure number.

A control, such as inspection or testing, introduced into an industrial or business process to ensure quality.

plural of quantum ferrofluid

(quantum mechanics) A thought experiment in which it is proposed that it is impossible to commit suicide, as at each attempt the universe will split into multiple realities, in at least one of which the person will still be alive.

plural of quality-adjusted life year

(quantum mechanics) A framework for describing the nuclear many-body problem as a relativistic system of baryons and mesons based on a local, Lorentz-invariant lagrangian density.