Alternative form of value added tax

(taxation) A tax levied on the added value that results from the exchange of goods and services

(chemistry) the outermost shell of electrons in an atom; these electrons take part in bonding with other atoms

(chemistry) any of the electrons in the outermost shell of an atom; capable of forming bonds with other atoms

Sickly, infirm, of ailing health / Being overly worried about one's health.

A person in poor health or sickly, especially one who is constantly obsessed with their state of health

(slang) The porn industry of San Fernando Valley. / Misspelling of Silicon Valley.

(informal) Originally, the region of the San Francisco Bay Area in which there are a high number of industries producing silicon chips; later extended to mean the entire concentration of high-tech businesses in this area.

(graph theory) The number of edges connected to a vertex in a graph. / (especially chemistry) Valence. / (linguistics) The capacity of a verb to take a specific number of arguments.

The act of validating something. / Something, such as a certificate, that validates something; attestation, authentication, confirmation, proof or verification.