A data clarification form (DCF) or data query form is a questionnaire specifically used in clinical research.
Defamation—also calumny, vilification, and traducement—is the communication of a false statement that harms the reputation of an individual person, business, product, group, government, religion, or nation.
Deforestation, clearance or clearing is the removal of a forest or stand of trees where the land is thereafter converted to a non-forest use.
Defibrillation is a treatment for life-threatening cardiac dysrhythmias, specifically ventricular fibrillation (VF) and non-perfusing ventricular tachycardia (VT).
Diffraction refers to various phenomena that occur when a wave encounters an obstacle or a slit. It is defined as the bending of light around the corners of an obstacle or aperture into the region of geometrical shadow of the obstacle.
The Defenders is a set of fictional superhero groups with fluctuating membership appearing in American comic books published by Marvel Comics.
Diffusion of innovations is a theory that seeks to explain how, why, and at what rate new ideas and technology spread.
Daft Punk are a French electronic music duo formed in 1993 by Guy-Manuel de Homem-Christo and Thomas Bangalter.