12-letter words containing p, a, s, o
- speciational — relating to speciation
- spectatorial — a person who looks on or watches; onlooker; observer.
- spectrograph — a spectroscope for photographing or producing a representation of a spectrum.
- speech organ — any part of the body, as the tongue, velum, diaphragm, or lungs, that participates, actively or passively, voluntarily or involuntarily, in the production of the sounds of speech.
- speedboating — the act, practice, or sport of traveling in a speedboat.
- spermagonium — Botany, Mycology. spermogonium.
- spermatocele — a swelling of the testicle
- spermatocide — spermicide.
- spermatocyte — a male germ cell (primary spermatocyte) that gives rise by meiosis to a pair of haploid cells (secondary spermatocytes) that give rise in turn to spermatids.
- spermatozoid — a motile male gamete produced in an antheridium.
- spermatozoon — one of the minute, usually actively motile gametes in semen, which serve to fertilize the ovum; a mature male reproductive cell.
- sphacelation — the process of mortification
- sphenography — the art of writing in cuneiform characters.
- sphygmograph — an instrument for recording the rapidity, strength, and uniformity of the arterial pulse.
- spiflication — rough treatment
- spinal block — spinal anesthesia.
- spiral-bound — having a spiral binding.
- spirochaetal — resulting from spirochaetes
- spit-roasted — cooked on a spit
- splenization — the transformation of something into a spleenlike tissue
- splenomegaly — enlargement of the spleen.
- sponged ware — spongeware.
- spongillafly — spongefly.
- spongioblast — one of the primordial cells in the embryonic brain and spinal cord capable of developing into neuroglia.
- sporadically — (of similar things or occurrences) appearing or happening at irregular intervals in time; occasional: sporadic renewals of enthusiasm.
- sporangiolum — a small sporangium
- sport jacket — A sport jacket is the same as a sport coat.
- sportability — suitability to be used in or as a sport
- sportscaster — A sportscaster is a radio or television broadcaster who describes or comments on sporting events.
- spotsylvania — a village in NE Virginia: the scene of Civil War battles between the armies of Grant and Lee, May 8–21, 1864.
- spotted cavy — paca.
- spotted tail — (Sinte-galeshka) 1833?–81, Brulé Sioux leader.
- square piano — a piano with a rectangular, horizontal body.
- stabilograph — an instrument for measuring body sway.
- stage pocket — one of several metal boxes placed backstage in the floor (floor pocket) or wall of a theater and containing jacks for electric cables used in lighting units.
- staging post — an area, as a port of embarkation, where troops are assembled and readied for transit to a new field of operations.
- stand up for — (of a person) to be in an upright position on the feet.
- stanley pool — a lake between the Democratic Republic of Congo and Congo-Brazzaville, formed by a widening of the River Congo. Area: 829 sq km (320 sq miles)
- stapedectomy — a microsurgical procedure to relieve deafness by replacing the stapes of the ear with a prosthetic device.
- state police — a police force under state authority rather than under the authority of a city or county in the state.
- state prison — a prison maintained by a state for the confinement of felons.
- statesperson — a statesman or stateswoman, a respected senior politician
- status group — a social stratum sharing the same lifestyle or occupation and having the same level of prestige.
- stauropegion — (in an autocephalous church) a monastery subject directly to the primate.
- steatopygous — extreme accumulation of fat on and about the buttocks, especially of women.
- steganograph — a piece of coded writing; cipher
- stegocarpous — (of a moss) belonging to the division Stegocarpi, having an operculate capsule
- stenographer — a person who specializes in taking dictation in shorthand.
- stenographic — the art of writing in shorthand.
- stenophagous — (of an animal) feeding on a limited variety of foods (opposed to euryphagous).