| dipole | A molecule that has both negative and positive charges. (09 Oct 1997) |
|---|---|
| dipole theory | A theory in which the activation current of the heart is conceived as a single net moving dipole, the positive pole leading. (05 Mar 2000) |
| flip | A burn occurring on one side only of the entrance site in a gunshot wound of the soft parts. (05 Mar 2000) |
| flip angle | In a magnetic resonance imaging sequence, the rotation of the average axis of the protons induced by radiofrequency signals; low angles are used in rapid-imaging sequences and to show a signal from flowing blood. (05 Mar 2000) |
| flip flop | A term used to describe the coordinated transfer of two phospholipid molecules from opposite sides of a lipid bilayer membrane. Now used to mean the passage of a phospholipid species from one lamella of a lipid bilayer membrane to the other. (18 Nov 1997) |
| flip-over disease | <disease> A disease of young, fast-growing broiler chickens which causes them to die suddenly with a short, terminal, wing-beating convulsion, whereby they often flip over and die on their backs. (05 Mar 2000) |