Siamese twins (linguistics) also known as a trinomial. Another name for this collocation is tricolon when the three parts are of the same or consistent grammatical form. Many of these could be considered triplets and satisfy the rule of three in writing. Siamese twins (linguistics) Siamese twins (also irreversible binomials, binomials, binomial pairs, nonreversible word pairs, or freezes) in the context of the English language refer to a pair or group of words used together as an idiomatic expression or collocation, usually conjoined by the words "and" or "or". The order of elements cannot be reversed. The expressions "milk and honey" (two nouns),
TWINS TWINS Two Wide-Angle Imaging Neutral-Atom Spectrometers (TWINS) are a pair of NASA instruments aboard two United States National Reconnaissance Office satellites in Molniya orbits. TWINS was designed to provide stereo images of the Earth's ring current. The first instrument, TWINS-1, was launched aboard USA-184 on 28 June 2006. TWINS-2 followed aboard USA-200 on March 13, 2008. Each instrument consists of an energetic neutral atom imager and a Lyman alpha detector. The ENA imager provides indirect remote sensing of the ring current ions, and the Lyman alpha detector gives a measure of the neutral hydrogen cloud about the Earth, known as