12-letter words containing t, a, p, i, r
- propaedeutic — pertaining to or of the nature of preliminary instruction.
- propagandist — a person involved in producing or spreading propaganda.
- prophylactic — defending or protecting from disease or infection, as a drug.
- propitiation — the act of propitiating; conciliation: the propitiation of the wrathful gods.
- propitiatory — serving or intended to propitiate.
- proportional — having due proportion; corresponding.
- propugnation — defence
- prosectorial — characteristic of a prosector
- prostacyclin — a prostaglandin, C 2 0 H 3 2 O 5 , that specifically inhibits the formation of blood clots.
- protactinium — a radioactive, metallic element. Symbol: Pa; atomic number: 91.
- protein-coat — the coiled or polyhedral structure, composed of proteins, that encloses the nucleic acid of a virus.
- protestation — the act of protesting or affirming.
- prothalamion — a song or poem written to celebrate a marriage.
- prothalamium — prothalamion.
- 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.
- prototherian — belonging or pertaining to the group Prototheria, comprising the monotremes.
- prototypical — the original or model on which something is based or formed.
- protreptical — didactic
- providential — of, relating to, or resulting from divine providence: providential care.
- provitamin a — carotene.
- prudentially — of, pertaining to, characterized by, or resulting from prudence.
- psi particle — any of a family of mesons consisting of a charmed quark and a charmed antiquark.
- psychiatrist — a physician who practices psychiatry.
- pteridomania — an excessive enthusiasm for ferns
- pteroic acid — a crystalline acid found in spinach
- pterosaurian — a pterosaur
- puerto rican — an island in the central West Indies: a commonwealth associated with the U.S. 3435 sq. mi. (8895 sq. km). Capital: San Juan. Abbreviation: P.R., PR.
- puncturation — the act of puncturing
- punditocracy — influential media pundits collectively.
- purification — to make pure; free from anything that debases, pollutes, adulterates, or contaminates: to purify metals.
- purlin plate — (in a curb roof) a purlin at the top of a lower slope supporting the ends of the upper rafters at the curb.
- putrefaction — the act or process of putrefying; the anaerobic decomposition of organic matter by bacteria and fungi that results in obnoxiously odorous products; rotting.
- putrefactive — the act or process of putrefying; the anaerobic decomposition of organic matter by bacteria and fungi that results in obnoxiously odorous products; rotting.
- pyrithiamine — an antivitamin that causes thiamine deficiency
- pyritohedral — of or relating to a pyritohedron
- pyromagnetic — (formerly) thermomagnetic (def 1).
- quarterpipes — Plural form of quarterpipe.
- rabbit punch — a short, sharp blow to the nape of the neck or the lower part of the skull.
- radar picket — a ship, vehicle, or aircraft stationed at a distance from a protected force to increase radar detection range.
- radiata pine — a pine tree, Pinus radiata, native to the western USA. but grown in Australia, New Zealand, and elsewhere to produce building timber
- radiator cap — a cap in the opening of a device for cooling an internal-combustion engine, through which coolant liquid can be added
- radioisotope — a radioactive isotope, usually artificially produced: used in physical and biological research, therapeutics, etc.
- radiophonist — a person who produces radiophonic music
- radiotherapy — treatment of disease by means of x-rays or of radioactive substances.
- ramapithecus — a genus of extinct Miocene ape known from fossils found in India and Pakistan and formerly thought to be a possible human ancestor.
- re-apportion — to apportion or distribute anew.
- reabsorption — resorption (def 2).
- readaptation — the act of adapting.
- reassumption — the act or process of reassuming something
- recapitalize — to renew or change the capital of.