-ˌtīd noun
( -s )
Etymology: International Scientific Vocabulary nucle- + -t- + -ide
1. : a compound that is formed by partial hydrolysis of a nucleic acid or occurs free in tissues, that is an ester of a nucleoside and a phosphoric acid, and that may consist of one or more units of phosphate-pentose-nitrogen base — see adenylic acid , cytidylic acid , guanylic acid , thymidylic acid , uridylic acid
2. : any of various compounds chemically related to those obtained from nucleic acids and including some coenzymes (as coenzyme A, the pyridine nucleotides, riboflavin phosphate)