While fretting today usually involves a concern that is figuratively eating at someone, fret has older senses that apply to literal eating. Fret comes from the Old English verb fretan, “to devour,” which …

FRET definition: to feel or express worry, annoyance, discontent, or the like. See examples of fret used in a sentence.

fret noun [C] (RAISED BAR) a thin, slightly raised metal bar, several of which are positioned across the neck (= long, narrow part) of some musical instruments, such as a guitar

FRET is analogous to near-field communication, in that the radius of interaction is much smaller than the wavelength of light emitted. In the near-field region, the excited chromophore emits a virtual photon …

If you fret about something, you worry about it. I was working all hours and constantly fretting about everyone else's problems. [V + about/over] But congressional staffers fret that the project will …

Fluorescence resonance energy transfer (FRET) is a distance-dependent interaction between the electronic excited states of two dye molecules in which excitation is transferred from a donor …

1. to feel or express worry, annoyance, discontent, or the like. 2. to cause corrosion; gnaw into something: acids that fret at the strongest metals.

Fluorescence resonance energy transfer is a process by which radiationless transfer of energy occurs from an excited state fluorophore to a second chromophore in close proximity.

Dec 25, 2025 · fret (third-person singular simple present frets, present participle fretting, simple past and past participle fretted) To bind, to tie, originally with a loop or ring.

FRET is the acronym of the Förster (Flourescence) Resonance Energy Transfer. The Förster energy transfer is the phenomenon that an excited donor transfers energy (not an electron) to an acceptor …