10-letter words containing a, p, r, o, s
- 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.
- 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.
- 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
- pupiparous — (of an insect) bearing fully developed larvae that are ready to pupate.
- 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.
- pyranoside — a glycoside containing a pyran ring structure.
- pyrolysate — a product of pyrolysis
- pythagoras — c582–c500 b.c, Greek philosopher, mathematician, and religious reformer.
- radarscope — the viewing screen of radar equipment.
- radioscope — an instrument, such as a fluoroscope, capable of detecting radiant energy
- radioscopy — the examination of objects opaque to light by means of another form of radiation, usually x-rays.
- rampageous — violent; unruly; boisterous.
- rat poison — substance toxic to rodents
- repoussage — the art or process of working in repoussé.
- respirator — a masklike device, usually of gauze, worn over the mouth, or nose and mouth, to prevent the inhalation of noxious substances or the like.
- rhapsodist — a person who rhapsodizes.
- rhapsodize — to talk with extravagant enthusiasm.
- rhodoplast — a plastid found in red algae, containing red pigment as well as chlorophyll
- rock spray — a low, evergreen, Himalayan shrub, Cotoneaster microphyllus, of the rose family, having shiny leaves with grayish, hairy undersides, white flowers, and scarlet berries.
- roma gypsy — a member of a people scattered throughout Europe and North America, who maintain a nomadic way of life in industrialized societies
- roof space — the attic space inside a roof
- rosa parks — Gordon (Alexander Buchanan) 1912–2006, U.S. photojournalist and film director.
- rosary pea — a woody tropical vine, Abrus precatorius , of the legume family, having extremely poisonous scarlet and black seeds that are used for beads and a root used as a substitute for licorice.
- rose aphid — a dark green aphid, Macrosiphum rosae, that feeds on roses and related plants.
- rose apple — any of various tropical trees belonging to the genus Syzygium, of the myrtle family, especially S. jambos, of the East Indies, having showy, greenish-white flowers and oval, yellowish fruit.
- rose topaz — a rose-pink form of topaz produced by heating yellow-brown topaz
- sally port — a gateway permitting the passage of a large number of troops at a time.
- sandgroper — a nickname for a Western Australian
- saponifier — to convert (a fat) into soap by treating with an alkali.
- saprogenic — producing putrefaction or decay, as certain bacteria.
- saprophyte — any organism that lives on dead organic matter, as certain fungi and bacteria.
- saprotroph — any organism, esp a fungus or bacterium, that lives and feeds on dead organic matter
- sarcopenia — reduction in muscle tissue as a result of ageing
- sarcophagi — a stone coffin, especially one bearing sculpture, inscriptions, etc., often displayed as a monument.
- sarcophile — a flesh-eating animal, especially the Tasmanian devil.
- sarcoplasm — the cytoplasm of a striated muscle fiber.
- schizocarp — a dry, dehiscent fruit that at maturity splits into two or more one-seeded carpels.
- scorpaenid — belonging or pertaining to the Scorpaenidae, a family of marine fishes with spiny fins, including the rockfishes, scorpionfishes, and lionfishes.
- scrap iron — old iron to be remelted or reworked.
- scrapegood — a stingy person; a miser
- scriptoria — a room, as in a monastery, library, or other institution, where manuscripts are stored, read, or copied.
- semaphoric — an apparatus for conveying information by means of visual signals, as a light whose position may be changed.
- separation — an act or instance of separating or the state of being separated.