15-letter words containing a, t, f, c
- ultracentrifuge — a high-speed centrifuge for subjecting sols or solutions to forces many times that of gravity and producing concentration differences depending on the weight of the micelle or molecule.
- ultramicrofiche — ultrafiche.
- unaccounted for — If people or things are unaccounted for, you do not know where they are or what has happened to them.
- unaccounted-for — not accounted for; not understood; unexplained: an explosion resulting from some unaccounted-for mechanical failure.
- unfair practice — unfair competition.
- unit of account — the function of money that enables the user to keep accounts, value transactions, etc
- velcro fastener — a fastener made of Velcro
- vicar of christ — the pope, with reference to his claim to stand in the place of Jesus Christ and possess His authority in the church.
- viral infection — disease caused by a virus
- vulgar fraction — common fraction.
- walk-in traffic — The walk-in traffic of a store is the number of people who choose to visit it as they pass by.
- walking catfish — an Asian catfish, Clarias batrachus, that can survive out of water and move overland from one body of water to another: introduced into Florida.
- warrant officer — (in the U.S. Armed Forces) an officer of one of four grades ranking above enlisted personnel and below commissioned officers.
- witch of agnesi — a plane curve symmetrical about the y- axis and asymptotic to the x- axis, given by the equation x 2 y =4 a 2 (2 a − y).
- yeast infection — candida: genital inflammation