12-letter words containing no
- siphonophore — any pelagic hydrozoan of the order Siphonophora, being a floating or swimming colony composed of polyps.
- siphonostele — a hollow tube of vascular tissue enclosing a pith and embedded in ground tissue.
- sleep apnoea — the temporary cessation of breathing during sleep, which in some cases is due to obstruction of the upper airway by enlarged tonsils, uvula, etc, causing the sufferer to snore loudly and fight for breath
- sleeve notes — the printed information on a record sleeve
- snobographer — a person who writes about snobs
- snollygoster — a clever, unscrupulous person.
- snooperscope — a device that displays on a fluorescent screen reflected infrared radiation, enabling the user to see objects obscured by darkness.
- snotty-faced — having visible nasal mucus on the face
- snotty-nosed — child: runny nose
- snout beetle — weevil (def 1).
- snow bunting — a bunting, Plectrophenax nivalis, of the northern parts of the Northern Hemisphere having white plumage.
- snow crystal — a crystal of ice sufficiently heavy to fall from the atmosphere.
- snow leopard — a long-haired, leopardlike feline, Panthera (Uncia) uncia, of mountain ranges of central Asia, having a relatively small head and a thick, creamy-gray coat with rosette spots: an endangered species.
- snow pudding — a pudding, prepared by folding egg whites into a lemon gelatin mixture.
- snow scooter — a small open powered vehicle mounted on skis for travelling on snow
- snow thrower — snow blower.
- snow-covered — Snow-covered places and things are covered over with snow.
- snowboarding — a board for gliding on snow, resembling a wide ski, to which both feet are secured and that one rides in an upright position.
- snowed under — If you say that you are snowed under, you are emphasizing that you have a lot of work or other things to deal with.
- snowmobilist — a person who drives a snowmobile, a snowmobiler
- snowshoe cat — a breed of cat with soft short hair, blue eyes, an inverted V-shaped marking on the face, and white feet
- snowy mespil — a N American tree, Amelanchier Lamarckii, that produces small white flowers in spring
- snowy plover — a small plover, Charadrius alexandrinus, mainly of the U.S. and Mexico, having a white breast and sand-colored upper parts.
- solenogaster — any of a group of wormlike mollusks, class Solenogastres (formerly Aplacophora), inhabiting deep ocean layers and having fine limy spicules on the covering mantle.
- solitudinous — the state of being or living alone; seclusion: to enjoy one's solitude.
- somnolescent — sleepy
- sonorousness — giving out or capable of giving out a sound, especially a deep, resonant sound, as a thing or place: a sonorous cavern.
- soprano clef — a sign locating middle C on the bottom line of the staff.
- sphenography — the art of writing in cuneiform characters.
- splenomegaly — enlargement of the spleen.
- square piano — a piano with a rectangular, horizontal body.
- stakhanovism — a method for increasing production by rewarding individual initiative, developed in the Soviet Union in 1935.
- stakhanovite — a worker in the Soviet Union who regularly surpassed production quotas and was specially honored and rewarded.
- steganograph — a piece of coded writing; cipher
- stenographer — a person who specializes in taking dictation in shorthand.
- stenographic — the art of writing in shorthand.
- stenophagous — (of an animal) feeding on a limited variety of foods (opposed to euryphagous).
- stenothermal — (of animals or plants) able to exist only within a narrow range of temperature
- stereognosis — the ability to determine the shape and weight of an object by touching or lifting it.
- sternocostal — of, relating to, or situated between the sternum and ribs.
- 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.
- stumpknocker — spotted sunfish.
- subarachnoid — of, relating to, or situated below the arachnoid membrane.
- suicide note — letter left by person ending own life
- sukarnoputri — Megawati (ˈmɛɡəˌwɒtɪ). born 1947, Indonesian politician; president of Indonesia (2001–04): daughter of Achmed Sukarno
- synclinorium — a regional structure of general synclinal form that includes a series of smaller folds.
- synonymously — having the character of synonyms or a synonym; equivalent in meaning; expressing or implying the same idea.
- tapioca snow — snow pellets.
- tardenoisian — of or referring to a Mesolithic culture characterized by small flint instruments
- tau neutrino — a hypothetical type of neutrino that would obey a conservation law together with the tau lepton, with the total number of tau leptons and tau neutrinos minus the total number of their antiparticles remaining constant.