12-letter words containing a, o, r, i, s
- praseodymium — a rare-earth, metallic, trivalent element, named from its green salts. Symbol: Pr; atomic weight: 140.91; atomic number: 59; specific gravity: 6.77 at 20°C.
- pratincolous — living in a meadow.
- praxinoscope — a toy in which a sequence of images, depicted on the inner surface of a cylinder and reflected in a series of mirrors, gives the illusion of motion as the cylinder rotates
- pre-socratic — of or relating to the philosophers or philosophical systems of the period before the Socratic period.
- preadmission — (in a reciprocating engine) admission of steam or the like to the head of the cylinder near the end of the stroke, as to cushion the force of the stroke or to allow full pressure at the beginning of the return stroke.
- precariously — dependent on circumstances beyond one's control; uncertain; unstable; insecure: a precarious livelihood.
- precessional — the act or fact of preceding; precedence.
- prediagnosis — Medicine/Medical. the process of determining by examination the nature and circumstances of a diseased condition. the decision reached from such an examination. Abbreviation: Dx.
- pregustation — the act of tasting beforehand
- prehensorial — relating to a part that grasps
- prehistorian — an authority on or specialist in prehistory
- preparations — measures done in order to prepare for something; provisions
- presentation — an act of presenting.
- preservation — to keep alive or in existence; make lasting: to preserve our liberties as free citizens.
- prestigiator — someone who practises sorcery or prestidigitation
- previsionary — having foresight
- primulaceous — belonging to the plant family Primulaceae.
- prison guard — an officer in charge of prisoners in a jail
- problematics — problems or difficulties in a particular situation or subject
- proboscidate — having a proboscis.
- proboscidean — pertaining to or resembling a proboscis.
- processional — of, relating to, or characteristic of a procession.
- prodigal son — a figure in a parable of Jesus (Luke 15:11–32); a wayward son who squanders his inheritance but returns home to find that his father forgives him.
- professional — following an occupation as a means of livelihood or for gain: a professional builder.
- professorial — a teacher of the highest academic rank in a college or university, who has been awarded the title Professor in a particular branch of learning; a full professor: a professor of Spanish literature.
- progymnasium — (in Europe) a school that prepares pupils for secondary education (the gymnasium)
- promuscidate — shaped like a proboscis
- propagandism — the art, system, or use of propaganda
- propagandist — a person involved in producing or spreading propaganda.
- proscribable — to denounce or condemn (a thing) as dangerous or harmful; prohibit.
- prosectorial — characteristic of a prosector
- prosodically — in a prosodic manner
- prosopopoeia — personification, as of inanimate things.
- prostacyclin — a prostaglandin, C 2 0 H 3 2 O 5 , that specifically inhibits the formation of blood clots.
- protestation — the act of protesting or affirming.
- protoplasmic — Biology. (no longer in technical use) the colloidal and liquid substance of which cells are formed, excluding horny, chitinous, and other structural material; the cytoplasm and nucleus.
- provisionary — providing or serving for the time being only; existing only until permanently or properly replaced; temporary: a provisional government.
- pseudorabies — a highly contagious, usually fatal disease of cattle, sheep, and other animals, caused by the herpesvirus Herpes suis, and characterized by severe pruritus and progressive central nervous system involvement sometimes including an aggressive excitement phase.
- pterosaurian — a pterosaur
- quadrillions — Plural form of quadrillion.
- quadrisonics — quadraphony.
- quai d'orsay — the quay along the south bank of the Seine in Paris, on which are located the Ministry of Foreign Affairs and other French government offices.
- quasi-normal — conforming to the standard or the common type; usual; not abnormal; regular; natural.
- rachiotomies — Plural form of rachiotomy.
- radicicolous — living on the roots of plants
- radicivorous — feeding on the roots of plants
- radio source — a cosmic object or phenomenon, as a galaxy, pulsar, quasar, or the remnant of a supernova or of a galactic collision, that emits radio waves.
- radioisotope — a radioactive isotope, usually artificially produced: used in physical and biological research, therapeutics, etc.
- radiophonist — a person who produces radiophonic music
- rainbow fish — guppy.