Category: D

  • Doxazosin mesylate

    A drug that is an a-blocker and serves as an antihypertensive medication.  

  • Downstream

    Base sequences in either DNA or RNA that proceed further in the direction of expression. In descriptions of genetic material, codons or base pairs that are on the 3’ side of a specific gene.  

  • Diurnal variation

    Cyclical changes in one or more features of the body over a 24-hour period.  

  • Disulfide bridge

    A covalent bond containing two sulfur molecules.  

  • Diphenylhydramine hydrochloride

    A ethanolamine derivative that serves as an antihistamine. It also is an antiemetic, an antivertigo agent, an antitussive, a sedative-hypnotic, and a dyskinetic.  

  • Diphenoxylate hydrochloride

    An antidiarrheal drug.  

  • Dihydroxy cholecalciferol

    The active form of vitamin D. Also called 1,25-dihydroxy cholecalciferol.  

  • Differential misclassification

    Errors in the necessary information (e.g., in exposure measurement) that are related to the state of disease. This type of misclassification has more serious consequences than the nondifferential or random misclassification. It can lead to either underestimation or overestimation of the effect.  

  • Dietitian

    Individual who has completed a minimum of a baccalaureate degree in dietetics or a related area in a U.S. accredited college or university, has completed a supervised clinical experience, and has passed a national examination. A dietitian is trained in the art of advising clients in the selections of foods appropriate to the age, nutrient…

  • Dietetic technician, registered

    Individual who has completed a minimum of an associate degree in dietetics or a related area at a U.S. regionally accredited college or university, has completed a supervised clinical experience, and has passed a national examination.