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 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 …

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

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 …

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.

Dec 25, 2025 · Noun fret (plural frets) (music) One of the pieces of metal, plastic or wood across the neck of a guitar or other string instrument that marks where a finger should be positioned to depress …

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.

Britannica Dictionary definition of FRET [count] : any one of a series of ridges on the neck of some stringed musical instruments (such as a guitar) — compare 2 fret

Aug 30, 2019 · We discuss important considerations for designing and evaluating ensemble FRET experiments.