10-letter words containing p, a, r, o
- prose edda — either of two old Icelandic literary works, one a collection of poems on mythical and religious subjects (or) erroneously attributed to Saemund Sigfusson (c1055–1133), the other a collection of ancient Scandinavian myths and legends, rules and theories of versification, poems, etc. (or) compiled and written in part by Snorri Sturluson (1179–1241).
- proseminar — a course conducted in the manner of a seminar for graduate students but often open to advanced undergraduates.
- proserpina — Persephone.
- proslavery — favoring slavery.
- prostatism — symptoms of prostate disorder, especially obstructed urination, arising from benign enlargement or chronic disease of the prostate gland.
- prostrated — to cast (oneself) face down on the ground in humility, submission, or adoration.
- protagoras — c480–c421 b.c, Greek Sophist philosopher.
- protanopia — a defect of vision in which the retina fails to respond to red or green.
- proteanism — readily assuming different forms or characters; extremely variable.
- protectant — a substance, as a chemical spray, that provides protection, as against insects, frost, rust, etc.; protective agent.
- proteinase — any of a group of enzymes that are capable of hydrolyzing proteins.
- protestant — any Western Christian who is not an adherent of a Catholic, Anglican, or Eastern Church.
- prothallus — prothallium.
- protistans — any of various one-celled organisms, classified in the kingdom Protista, that are either free-living or aggregated into simple colonies and that have diverse reproductive and nutritional modes, including the protozoans, eukaryotic algae, and slime molds: some classification schemes also include the fungi and the more primitive bacteria and blue-green algae or may distribute the organisms between the kingdoms Plantae and Animalia according to dominant characteristics.
- proto team — a team of workers trained to perform underground rescues
- protocolar — the customs and regulations dealing with diplomatic formality, precedence, and etiquette.
- protogenia — the first woman born after the great flood of Zeus, daughter of Deucalion and Pyrrha.
- protohuman — of, relating to, or resembling extinct hominid populations that had some but not all the features of modern Homo sapiens.
- protoplasm — 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.
- protoplast — Biology. the contents of a cell within the cell membrane, considered as a fundamental entity. the primordial living unit or cell.
- protracted — to draw out or lengthen, especially in time; extend the duration of; prolong.
- protractor — a person or thing that protracts.
- provenance — place or source of origin: The provenance of the ancient manuscript has never been determined.
- provencale — (sometimes lowercase) cooked, usually in olive oil, with garlic, tomatoes, onions, and herbs.
- proverbial — of, relating to, or characteristic of a proverb: proverbial brevity.
- providable — to make available; furnish: to provide employees with various benefits.
- provincial — belonging or peculiar to some particular province; local: the provincial newspaper.
- provitamin — a substance that an organism can transform into a vitamin, as carotene, which is converted to vitamin A in the liver.
- provokable — able to be provoked
- proximally — situated toward the point of origin or attachment, as of a limb or bone. Compare distal (def 1).
- psammosere — a sere originating on sand or sandy soil.
- pseudocarp — accessory fruit.
- psychogram — a message believed to be written by a spirit or authored by psychical means
- pteranodon — a flying reptile of the extinct order Pterosauria, from the Cretaceous Period, having a wingspread of about 25 feet (8 meters).
- punchboard — a small board containing holes filled with slips of paper printed with concealed numbers that are punched out by a player in an attempt to win a prize.
- punctuator — to mark or divide (something written) with punctuation marks in order to make the meaning clear.
- pupiparous — (of an insect) bearing fully developed larvae that are ready to pupate.
- purgatoire — a river in SE Colorado, flowing NE to the Arkansas River. 186 miles (299 km) long.
- put across — to move or place (anything) so as to get it into or out of a specific location or position: to put a book on the shelf.
- pyatigorsk — a city in the SW Russian Federation in Europe, in Caucasia.
- pyramidion — a miniature pyramid, as at the apex of an obelisk.
- pyranoside — a glycoside containing a pyran ring structure.
- pyrazoline — any of the group of heterocyclic compounds containing three carbon atoms, two adjacent nitrogen atoms, and one double bond in the ring.
- pyrazolone — any of the group of heterocyclic compounds containing the pyrazoline ring in which one carbon atom is doubly linked to an oxygen atom not in the ring.
- pyrenocarp — Mycology. a perithecium.
- pyroborate — borax1 .
- pyrogallol — a white, crystalline, water-soluble, poisonous, solid, phenolic compound, C 6 H 3 (OH) 3 , obtained by heating gallic acid and water: used chiefly as a developer in photography, as a mordant for wool, in dyeing, and in medicine in the treatment of certain skin conditions.
- pyrography — the process of burning designs on wood, leather, etc., with a heated tool.
- pyrolysate — a product of pyrolysis
- pyromaniac — a compulsion to set things on fire.