fret

v. worry, annoy, irritate; get annoyed; become worried; corrode, erode; wear out, tire; decorate with fretwork

n. irritation, worry, anxiety; erosion, wearing away; area that has been eroded; ornamental design; any of the ridges of wood or metal on a fingerboard (of a guitar, lute, etc.)

For the acronym FRET in molecular biology, see Fluorescence resonance energy transfer. A fret is a raised portion on the neck of a stringed instrument, that extends generally across the full width of the neck. On most modern western instruments, frets are metal strips inserted into the fingerboard. On historical instruments and some non-European instruments, pieces of string tied around the neck serve as frets.
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Fluorescence resonance energy transfer (FRET) describes an energy transfer mechanism between two chromophores. A donor chromophore in its excited state can transfer energy by a nonradiative, long-range dipole-dipole coupling mechanism to an acceptor chromophore in close proximity (typically <10nm). This energy transfer mechanism is termed "Förster resonance energy transfer" (FRET), named after the German scientist Theodor Förster. When both molecules are fluorescent, the term "fluorescence resonance energy transfer" is often used, although the energy is not actually transferred by fluorescence.,. In order to avoid an erroneous interpretation of the phenomenon that, even when occurring between two fluorescent molecules, is always a nonradiative transfer of energy, the name "Förster resonance energy transfer" may be preferred to "Fluorescence resonance energy transfer".
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Fret·ting n. A hole, or worn or polished spot made on metals by abrasion or erosion. [more]Fret - Community and Resources

Noun
1. agitation resulting from active worry; "don't get in a stew"; "he's in a sweat about exams"
(synonym) stew, sweat, lather, swither
(hypernym) agitation
(derivation) fuss, niggle
2. a spot that has been worn away by abrasion or erosion
(synonym) worn spot
(hypernym) spot, speckle, dapple, patch, fleck, maculation
(derivation) chafe, gall
3. an ornamental pattern consisting of repeated vertical and horizonal lines (often in relief); "there was a simple fret at the top of the walls"
(synonym) Greek fret, Greek key, key pattern
(hypernym) architectural ornament
4. a small bar of metal across the fingerboard of a musical instrument; when the string is stopped by a finger at the metal bar it will produce a note of the desired pitch
(hypernym) bar
Verb
1. worry unnecessarily or excessively; "don't fuss too much over the grandchildren--they are quite big now"
(synonym) fuss, niggle
(hypernym) worry
(hyponym) scruple
(derivation) stew, sweat, lather, swither
2. be agitated or irritated; "don't fret over these small details"
(hypernym) worry
(hyponym) dither
3. provide (a musical instrument) with frets; "fret a guitar"
(hypernym) supply, provide, render, furnish
4. become or make sore by or as if by rubbing
(synonym) chafe, gall
(hypernym) irritate
(derivation) worn spot
5. cause annoyance in
(hypernym) annoy, rag, get to, bother, get at, irritate, rile, nark, nettle, gravel, vex, chafe, devil
6. gnaw into; make resentful or angry; "The unjustice rankled her"; "his resentment festered"
(synonym) eat into, rankle, grate
(hypernym) annoy, rag, get to, bother, get at, irritate, rile, nark, nettle, gravel, vex, chafe, devil
7. carve a pattern into
(hypernym) carve
(hyponym) honeycomb
(derivation) Greek fret, Greek key, key pattern
(classification) handicraft
8. decorate with an interlaced design
(hypernym) decorate, adorn, grace, ornament, embellish, beautify
(derivation) Greek fret, Greek key, key pattern
9. be too tight; rub or press; "This neckband is choking the cat"
(synonym) choke, gag
(hypernym) compress, constrict, squeeze, compact, contract, press
10. cause friction; "my sweater scratches"
(synonym) rub, fray, chafe, scratch
(hypernym) touch, adjoin, meet, contact
11. remove soil or rock; "Rain eroded the terraces"
(synonym) erode, eat away
(hypernym) damage
(hyponym) wash
12. wear away or erode
(synonym) eat away
(hypernym) corrode, rust

n. freight, freightage, freight charges