13-letter words containing a, n, i
- space science — any of the sciences involved in space travel or the exploration of space, as space medicine.
- space station — an orbiting manned structure that can be used for a variety of purposes, as to assemble or service satellites, refuel spacecraft, etc.
- spanish broom — a spiny, often leafless shrub, Genista hispanica, of the legume family, native to southern Europe, having clustered, golden-yellow flowers and hairy pods.
- spanish cedar — a tropical American tree, Cedrela odorata, of the mahogany family.
- spanish onion — a large-sized, mild, succulent onion, often eaten raw.
- spanish river — a river in S Ontario, Canada, flowing S into the North Channel of Lake Huron. 150 miles (241 km) long.
- spanish topaz — citrine (def 2).
- spark erosion — a method of machining using a shaped electrode which erodes the workpiece by an electric spark discharge between itself and the workpiece
- sparking plug — spark plug (def 1).
- spastic colon — a chronic condition of recurring abdominal pain with constipation or diarrhoea or both
- speaking part — a part in which the character speaks scripted dialogue
- speaking tube — a tube for conveying the voice over a somewhat limited distance, as from one part of a building or ship to another.
- speaking type — a device on a medal or coin that has a punning reference to a person or thing.
- special agent — an investigator in a law enforcement agency.
- special needs — learning difficulties
- specific name — the second part in the name of a species, such as norvegicus in Rattus norvegicus
- specification — the act of specifying.
- specimen page — a page regarded as typical of pages of its type, esp one produced by a typesetter or designer to show an example of the typesetting for a book
- spectral line — a line in a spectrum due to the absorption or emission of light at a discrete frequency.
- speech island — a speech community that is completely surrounded by another, usually larger, speech community.
- speech making — act of addressing the public formally
- speechreading — the act or process of determining the intended meaning of a speaker by utilizing all visual clues accompanying speech attempts, as lip movements, facial expressions, and bodily gestures, used especially by people with impaired hearing.
- speed dialing — to dial (a telephone number) using speed dial.
- speed reading — a method of reading faster than normal, esp by skimming
- speed skating — ice skating as a form of racing, usually on an oval course and against other competitors or the clock.
- speed walking — power walking.
- spenta mainyu — the good and creative spirit that is the offspring of Ahura Mazda.
- sperm washing — a technique that separates sperm from the seminal fluid, used especially for isolating active sperm for artificial insemination.
- spermatangium — the organ that produces spermatia in red algae.
- spermatogenic — relating to the development of spermatozoa
- spermatotoxin — spermotoxin.
- sperry univac — (company) One of the divisions of Sperry Corporation at the time that company merged with the Burroughs Corporation to form Unisys Corporation.
- sphagnicolous — growing in moss
- sphagnologist — a person who studies sphagna
- spice islands — the Moluccas
- spinal column — the series of vertebrae in a vertebrate animal forming the axis of the skeleton and protecting the spinal cord; spine; backbone.
- spindleshanks — spindlelegs.
- spine-bashing — to rest; loaf.
- spiral casing — a spiral passage for directing the water from a penstock around a water turbine and into the rotor.
- spiral nebula — (formerly) a spiral galaxy.
- spiral spring — a form of spring consisting of a wire coiled in a helix.
- splenial bone — a small bone in the lower jaw of some animals, such as reptiles and birds
- splitting adz — a heavy stone tool used by prehistoric peoples in northwestern North America and northeastern Asia.
- spokesmanship — the office or skilful use of the office of spokesman
- spontaneities — the exhibiting of actions, impulses, or behaviour that are stimulated by internal processes
- sporting lady — a prostitute.
- sportscasting — the reporting of a sports event by radio or television broadcast.
- sportsmanlike — a man who engages in sports, especially in some open-air sport, as hunting, fishing, racing, etc.
- sportsmanship — the character, practice, or skill of a sportsman.
- spread option — spread (def 25b).