17-letter words containing y, a, f
- to feel your oats — to feel exuberant or high-spirited
- to play the field — If someone plays the field, they have a number of different romantic or sexual relationships.
- to play with fire — If you say that someone is playing with fire, you mean that they are doing something dangerous that may result in great harm for them and cause many problems.
- to say nothing of — You use to say nothing of when you mention an additional thing which gives even more strength to the point you are making.
- to show your face — If you show your face somewhere, you go there and see people, although you are not welcome, are rather unwilling to go, or have not been there for some time.
- tyrant flycatcher — flycatcher (def 2).
- unconformity trap — An unconformity trap is a hydrocarbon trap where the closure is made by an unconformity (= a formation of rock layers which represents a gap in the geological record).
- unify corporation — (company) Developers of the Unify relational database. At one time, before Sybase, they were a competitor of Oracle, et al.
- unlawful assembly — a meeting of three or more people with the intent of carrying out any unlawful purpose
- walleye surfperch — a common black and silvery surfperch (Hyperprosopon argenteum) found off the coast of California
- water lily family — the plant family Nymphaeaceae, characterized by aquatic herbaceous plants having usually broad leaves, solitary, often showy flowers, and fruit in a variety of forms, and including the lotus (genus Nelumbo), spatterdock, water lily, and water shield.
- willow flycatcher — a North American flycatcher, Empidonax alnorum, of alder thickets and other moist areas, that has greenish-brown upper parts and whitish underparts and is almost indistinguishable except by voice from E. traillii (willow flycatcher)
- x-ray diffraction — diffraction of x-rays by the regularly spaced atoms of a crystal, useful for determining the arrangement of the atoms.
- year of confusion — (in ancient Rome) the year of 445 days preceding the introduction, in 46 b.c., of the Julian calendar: lengthened to compensate for the cumulative errors of the Roman calendar.
- yellowstone falls — a waterfall in NW Wyoming, in Yellowstone National Park on the Yellowstone River