Some libraries have eliminated their card catalog in favour of the OPAC for the purpose of saving space for other use, such as additional shelving. The largest library catalog in the world is the WorldCat.org union catalog managed by the non-profit library cooperative OCLC, based in Dublin, Ohio. As of January 2016, WorldCat.org has over 360,000,000 catalog records and over 2 billion library holdings. Card catalog at Yale.
Weed definition, a valueless plant growing wild, especially one that grows on cultivated ground to the exclusion or injury of the desired crop. See more. Dictionary.com
Definition of herb. 1 botany : a seed-producing annual, biennial, or perennial that does not develop persistent woody tissue but dies down at the end of a growing season. 2 : a plant or plant part valued for its medicinal, savory, or aromatic qualities planted parsley, basil, and rosemary in her herb garden. 3 slang : marijuana 2.