noun pl. f's, F's

1. the sixth letter of the English alphabet: a modification of the Old Greek digamma (), ultimately from the Phoenician
2. any of the speech sounds that this letter represents, as, in English, the (f) of fire
3. a type or impression for f or F
4. the sixth in a sequence or group
5. an object shaped like

adjective

1. of f or F
2. sixth in a sequence or group
3. shaped like

1. femto-
2. Physics frequency
3. furlong(s)

noun

1. Educ.
   1. a grade indicating failing work
   2. sometimes, a grade indicating fair or average work
2. Music
   1. the fourth tone or note in the ascending scale of C major
   2. the scale having this tone as a keynote
   3. a note representing this tone
   4. a key, string, etc. producing this tone

1. Fahrenheit
2. farad(s)
3. faraday(s)
4. Father
5. February
6. Fellow (of a learned society)
7. female or feminine
8. Genetics filial generation
9. fine
10. Insurance fire
11. Photog. f-number
12. folio(s)
13. following
14. Physics force
15. franc(s)
16. French
17. Friar
18. Friday
19. Math. function
20. Pharmacy

    1. Etymology: L fiat

       let there be made

    2. Etymology: L fac

       make