13-letter words containing p, a, r, x
- morpho-syntax — the study of the morphological and syntactic properties of linguistic or grammatical units.
- overexpansion — the act or process of expanding.
- pandora's box — a source of extensive but unforeseen troubles or problems: The senate investigation turned out to be a Pandora's box for the administration.
- paradoxically — having the nature of a paradox; self-contradictory.
- paramyxovirus — any of various RNA-containing viruses that are similar to but larger than the myxoviruses, including the viruses that cause mumps, measles, parainfluenza, and Newcastle disease.
- parasexuality — parasexual behaviour
- part exchange — If you give an old item in part exchange for something you are buying, the seller accepts the old item as part of the payment, so you do not have to give them as much money.
- posix threads — (programming) (Pthreads) A POSIX standard API that defines a set of C programming language types, functions and constants for creating and manipulating pre-emptive threads. The standard's full name is "POSIX.1c, Threads extensions (IEEE Std 1003.1c-1995)". Implementations are available on many Unix-like POSIX-conformant operating systems such as FreeBSD, NetBSD, OpenBSD, GNU/Linux, Mac OS X and Solaris as well as DR-DOS and Microsoft Windows. Pthreads was designed and implemented in the PART Project (POSIX / Ada-Runtime Project).
- practice exam — an informal examination taken as a preparation for an actual or formal examination
- praxeological — of or pertaining to praxeology
- praxiological — the study of human conduct.
- preexcitation — the act of exciting.
- prefix syntax — prefix notation
- primary xylem — xylem derived directly from the growth of an apical meristem.
- proparoxytone — having an accent or heavy stress on the antepenultimate syllable.
- proxy gateway — proxy server
- sacral plexus — a nerve network originating from the nerves of the sacral spine and innervating large areas of the lower trunk and legs, especially via the sciatic nerves.
- saint-exupery — Antoine de [ahn-twan duh] /ɑ̃ˈtwan də/ (Show IPA), 1900–45, French author and aviator.
- soapbox derby — a race between children in homemade racing carts
- spermatotoxic — spermotoxic.
- spermatotoxin — spermotoxin.
- spiral galaxy — a galaxy having a spiral structure.
- tax inspector — a government official whose job is to make sure that people and companies are paying the right amount of tax
- texture paint — a finish paint having an insoluble additive, as sand, for giving a slightly rough textural effect.
- unexplanatory — serving to explain: an explanatory footnote.
- visual foxpro — (database) A Microsoft database derived from Fox Software's FoxPRO.
- x-ray therapy — treatment of a disease using controlled quantities of x-rays.
- xerophthalmia — abnormal dryness of the eyeball characterized by conjunctivitis, caused by a deficiency of tears and attributed to a lack of vitamin A.
- xerophthalmic — Of or pertaining to xerophthalmia.
- xiphiplastral — pertaining to or comprising a xiphiplastron
- xiphiplastron — the fourth lateral plate of a turtle's plastron
- xylographical — Xylographic.
- zoopraxiscope — an early type of motion-picture projector, designed by Eadweard Muybridge, in which the images were drawings or photographs placed along the rim of a circular glass plate, the shutter was a rotating opaque disk with radial slots, and a limelight source was used.