(medicine) Use of two differing sources of radiation to measure the density of a substance, typically bone.

A theory of cognition according to which visual and verbal information are both used to represent information, but processed in different ways.

plural of dual-clutch gearbox

(grammar) The dual of the first-person form of a verb or pronoun, which in some languages can either be inclusive ("you and I") or exclusive ("he and I"). In other languages, there is no distinction.

(grammar) The pronoun associated with this form. / (grammar) The possessive adjective associated with this form.

(grammar) A variety of third-person verb form used when the subject of a sentence is exactly two people other than the speaker or the audience, used in some languages, such as Greek.

(economics) A model in development economics that explains the growth of a developing economy in terms of a labour transition between the capitalist sector and the subsistence sector.

(Taoism) The process of cultivation involving sexual intercourse between a man and a woman.

plural of first-person dual

plural of third-person dual