12-letter words that end in o
- marcatissimo — in a heavily accented manner
- matto grosso — Mato Grosso.
- measure zero — the property of a set of points for which, given any small number, there exists a set of intervals such that each point of the given set is contained in at least one of the intervals and such that, essentially, the combined length of the intervals is less than the small number.
- michelangelo — (Michelangelo Buonarroti) 1475–1564, Italian sculptor, painter, architect, and poet.
- middle congo — former name of the People's Republic of the Congo.
- mixing ratio — the ratio of the mass of water vapor in the air to the mass of the dry air, a measure of atmospheric humidity.
- mohenjo-daro — an archaeological site in Pakistan, near the Indus River: six successive ancient cities were built here.
- monte bianco — Mon·te [mawn-te] /ˈmɔn tɛ/ (Show IPA). Italian name of Mont Blanc.
- monte cristo — a sandwich containing slices of ham, chicken, and Swiss cheese, dipped in beaten egg and fried until brown.
- motu proprio — any of certain documents issued by the pope without counsel from others.
- murfreesboro — a city in central Tennessee: battle of Stone River (or Murfreesboro) 1862.
- next door to — immediately following in time, order, importance, etc.: the next day; the next person in line.
- no thanks to — to express gratitude, appreciation, or acknowledgment to: She thanked them for their hospitality.
- north borneo — a former name of Sabah.
- nuevo laredo — a city in NE Mexico, on the Rio Grande opposite Laredo, Texas.
- only have to — If you say you only have to do one thing in order to achieve or prove a second thing, you are emphasizing how easily the second thing can be achieved or proved.
- out of tempo — not in tempo
- packet radio — (communications, radio) The use of packet switched communications protocols in large networks (i.e not wireless LANs or Bluetooth) having wireless links to terminals at least. Packet radio is split into amateur packet radio (AX25) and General Packet Radio Service (GRPS).
- palo cortado — a rich, dry sherry
- papal nuncio — someone, such as an archbishop, who is a state's representative of or ambassador to the Pope
- parmigianino — (Girolamo Francesco Maria Mazzola) 1503–40, Italian painter.
- pay court to — to court, as for favor or love
- payout ratio — the ratio between dividends paid out and earnings per share of common stock within a time period.
- pinot grigio — a variety of grape, grown in Italy for wine-making
- pinturicchio — real name Bernardino di Betto. ?1454–1513, Italian painter of the Umbrian school
- pipe tobacco — tobacco suitable for use in a tobacco pipe
- pirate radio — radio broadcasting illegally
- player piano — a piano that can play automatically when the keys are actuated electronically or by a pneumatic device controlled by a piano roll.
- pogson ratio — the brightness ratio of two celestial objects that differ by one magnitude. On the Pogson scale a difference of 5 magnitudes is defined as a difference of 100 in the intensities of two stars; therefore a difference of 1 magnitude is equal to the fifth root of 100, i.e. 2.512
- quattrocento — the 15th century, used in reference to the Italian art and literature of that time.
- quid pro quo — something that is given or taken in return for something else.
- quintana roo — a sparsely populated state in SE Mexico, on the E Yucatán peninsula. 19,435 sq. mi. (50,335 sq. km). Capital: Chetumal.
- quo warranto — (formerly, in England) a writ calling upon a person to show by what authority he or she claims an office, franchise, or liberty.
- rat kangaroo — any of several rabbit-sized, ratlike Australian kangaroos of the subfamily Potoroinae.
- rat-kangaroo — any of several rabbit-sized, ratlike Australian kangaroos of the subfamily Potoroinae.
- red kangaroo — a large Australian kangaroo, Macropus rufus, the male of which has a reddish coat
- ring-a-levio — a children's game in which members of one group try to find and capture hiding members of another group: a captured player is kept in a circle drawn on the ground and is set free when tagged by a teammate
- risorgimento — the period of or the movement for the liberation and unification of Italy 1750–1870.
- royal octavo — a book size, 61⁄4 by 10 inches
- royal quarto — a book size, 10 by 121⁄2 inches
- ryobu shinto — a fusion of Shinto and Buddhism, which flourished in Japan in the 13th century
- san bernardo — a city in central Chile, S of Santiago.
- san fernando — a city in E Argentina, near Buenos Aires.
- saw palmetto — a shrublike palmetto, Serenoa repens, of the palm family, native to the southern U.S., having green or blue leafstalks set with spiny teeth.
- sixty-fourmo — a book size (about 2 × 3 inches; 5 × 7 cm) determined by printing on sheets folded to form 64 leaves or 128 pages.
- sonata-rondo — a musical form combining characteristics of both the sonata form and the rondo.
- square piano — a piano with a rectangular, horizontal body.
- sranan tongo — Sranan.
- stretch limo — A stretch limo is a very long and luxurious car in which a rich, famous, or important person is driven somewhere.
- stride piano — a style of jazz piano playing in which the right hand plays the melody while the left hand plays a single bass note or octave on the strong beat and a chord on the weak beat, developed in Harlem during the 1920s, partly from ragtime piano playing.