A tensor with all entries equal to zero; where any pattern of covariant and contravariant indices have all components equal to 0. / A generalization of the zero vector to tensor space.

A river in Southern Africa, flowing south and west from Zambia through east Angola and Zambia and then east along the border between Zambia and Zimbabwe into and through central Mozambique to the Indian Ocean.

(management) A budget developed disregarding the expenses or costs of the prior year, requiring explicit justification for all expenditures.

A species of zebra, native to South-western Angola, Namibia and South Africa, (Equus zebra)

(law) a witness who has favoritism towards one party in a case.

A species of carpet shark, Stegostoma fasciatum, family Stegostomatidae, covered in black and white stripes.

(computing, informal) The rule that a database, a user interface, etc. should allow for either zero, one, or an indefinite number of an entity.

atmospheric air specially cleaned so that it contains less than 0.1 ppm of hydrocarbon impurities; it then is usable in laboratory procedures such as versions of gas chromatography in which sufficiently pure air may serve as a carrier gas.

(usually used attributively, finance) A non-existent coupon. / (finance) A financial security that does not pay interest periodically.

Alternative spelling of zebrafish