(inorganic chemistry) The binary compound NO₂, a brownish gas that is a poisonous air pollutant; it exists in equilibrium with dinitrogen tetroxide.

a reddish-yellow explosive gas, ClO₂, used as a water disinfectant and to bleach flour and wood pulp

(physics) A metal-semiconductor diode that exhibits a nonlinear voltage/current relationship

A light-emitting diode constructed from a thin film of an organic compound.

(botany) Having the male and female reproductive organs on separate plants (of the same species) rather than different parts of the same plant. / (zoology, rare) Having two distinct sexes.

(physics) A semiconductor diode that has negative resistance in the forward direction of its operating range due to quantum effects.

(inorganic chemistry) A black, semiconducting material, CrO₂, having strong magnetic properties; used in recording tapes.

(electronics) A semiconductor junction device through which current flows normally in the forward direction, and in the reverse direction if a large voltage is applied.

(organic chemistry) A compound with a high boiling point, found in some aerosols (C₂₄,H₃₈,O₄).

plural of diode