15-letter words containing m, o, r
- spermatogenesis — the origin and development of spermatozoa.
- spirochaetaemia — the presence of spirochaetes in the blood
- sports medicine — a field of medicine concerned with the functioning of the human body during physical activity and with the prevention and treatment of athletic injuries.
- squirrel monkey — either of two small, long-tailed monkeys, Saimiri oerstedii of Central America and S. sciureus of South America, having a small white face with black muzzle and gold, brown, or greenish fur: S. oerstedii is endangered.
- st. elmo's fire — St. Elmo's fire.
- st. ulmo's fire — St. Elmo's fire.
- stamford bridge — a village in N England, east of York: site of a battle (1066) in which King Harold of England defeated his brother Tostig and King Harald Hardrada of Norway, three weeks before the Battle of Hastings
- stamping ground — a habitual or favorite haunt.
- star-nosed mole — a North American mole, Condylura cristata, having a starlike ring of fleshy processes around the end of the snout.
- start something — to cause a disturbance or trouble
- statutory crime — a wrong punishable under a statute, rather than at common law.
- steam generator — steam-producing power plant
- steam reforming — a process in which methane from natural gas is heated, with steam, usually with a catalyst, to produce a mixture of carbon monoxide and hydrogen used in organic synthesis and as a fuel
- steering column — the shaft that connects the steering wheel to the steering gear assembly of an automotive vehicle.
- stereochemistry — the branch of chemistry that deals with the determination of the relative positions in space of the atoms or groups of atoms in a compound and with the effects of these positions on the properties of the compound.
- stereoisomerism — the isomerism ascribed to different relative positions of the atoms or groups of atoms in the molecules of organic compounds.
- stomping ground — a habitual or favorite haunt.
- stony meteorite — any of various meteorites composed mainly of rock-forming silicates, especially olivine, plagioclase, and pyroxene, and classified as achondrites or chondrites.
- storm insurance — insurance cover against damage caused by windstorms
- streamline flow — the flow of a fluid past an object such that the velocity at any fixed point in the fluid is constant or varies in a regular manner.
- strephosymbolia — a condition of perceiving objects as their mirror image and, specifically, having difficulty in distinguishing letters in words
- strombuliferous — having organs coiled as spirals
- strontium oxide — a white insoluble solid substance used in making strontium salts and purifying sugar. Formula: SrO
- subcommissioner — a member of a subcommission
- sully-prudhomme — René François Armand [ruh-ney frahn-swa ar-mahn] /rəˈneɪ frɑ̃ˈswa arˈmɑ̃/ (Show IPA), 1839–1907, French poet: Nobel prize 1901.
- sumatra camphor — borneol.
- summary offence — an offence that is triable in a magistrates' court
- summer flounder — a flounder, Paralichthys dentatus, inhabiting shallow waters from Cape Cod to South Carolina, valued as food.
- summer holidays — the time when children do not go to school in the summer
- summer solstice — the solstice on or about June 21st that marks the beginning of summer in the Northern Hemisphere.
- super-committee — a committee with members from two or more organizations or political groups
- supergovernment — a centralized organization formed by a group of governments to enforce justice or maintain peace.
- superimposition — to impose, place, or set over, above, or on something else.
- superpatriotism — the quality of being superpatriotic
- superphenomenon — a phenomenon that is beyond the typical qualities of phenomena
- support mission — assistance given by one military unit to another to assist in the accomplishment of the supported unit's mission.
- supporting film — a film that accompanies the main feature film in a film programme
- supreme council — the legislature of the former Soviet Union and its successor states, consisting of an upper house (Soviet of the Union or Council of the Union) whose delegates are elected on the basis of population, and a lower house (Soviet of Nationalities or Council of Nationalities) whose delegates are elected to represent the various nationalities.
- swiss army code — (programming, humour) Code for an application that is suffering from feature creep. Swiss Army Code does many things, but does none of them well.
- symbol retailer — any member of a voluntary group of independent retailers, often using a common name or symbol, formed to obtain better prices from wholesalers or manufacturers in competition with supermarket chains
- symmetric group — the group of all permutations of a finite set.
- symphony writer — a composer of an extended large-scale orchestral composition, usually with several movements, at least one of which is in sonata form
- system operator — a person who maintains a computer system or network, especially one who operates a computer bulletin board.
- tablet computer — a number of sheets of writing paper, business forms, etc., fastened together at the edge; pad.
- take it from me — You can say 'take it from me' to tell someone that you are absolutely sure that what you are saying is correct, and that they should believe you.
- talcum (powder) — a powder for the body and face made of powdered, purified talc, usually perfumed
- tall meadow rue — a meadow rue, Thalictrum polygamum.
- tarsometatarsal — the large bone in the lower leg of a bird with which the toe bones articulate, formed by the fusion of tarsal and metatarsal bones.
- tarsometatarsus — the large bone in the lower leg of a bird with which the toe bones articulate, formed by the fusion of tarsal and metatarsal bones.
- tatra mountains — a mountain range along the border between Slovakia and Poland, extending for about 64 km (40 miles): the highest range of the central Carpathians. Highest peak: Gerlachovka, 2663 m (8737 ft)