Toll definition, a payment or fee exacted by the state, the local authorities, etc., for some right or privilege, as for passage along a road or over a bridge. See more. Dictionary.com
The International Union of Pure and Applied Chemistry (IUPAC, /ËaÉªjuËpÃ¦k/ or /ËjuËpÃ¦k/) is an international federation of National Adhering Organizations that represents chemists in individual countries. It is a member of the International Council for Science (ICSU).
OPAC is the Online Public Access Catalogue or, in other words, the library catalogue. online database of all of the resources held in the library. books in the library. loan, and their call number.