Semi- Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and many other languages, they are used to coin numerous series of words. For example: * unicycle, bicycle, tricycle (1-cycle, 2-cycle, 3-cyc ...

is a numerical prefix meaning "half". The prefix alone is often used as an abbreviation when the rest of the word (the thing which half of is being described) is clear from context. Semi or SEMI may refer to: *

Semiconductor Equipment and Materials International SEMI is an industry association comprising companies involved in the electronics design and manufacturing supply chain. They provide equipment, materials and services for the manufacture of semiconductors, photovoltaic panels, LED and flat panel ...

(SEMI) *

Semiconductor industry The semiconductor industry is the aggregate of companies engaged in the design and fabrication of semiconductors and semiconductor devices, such as transistors and integrated circuits. It formed around 1960, once the fabrication of semiconduct ...

, also known as semi or semis in financial news *

Semi-automatic firearm A semi-automatic firearm, also called a self-loading or autoloading firearm (fully automatic and selective fire firearms are also variations on self-loading firearms), is a repeating firearm whose action mechanism ''automatically'' loads a follow ...

Semi-detached A semi-detached house (often abbreviated to semi) is a single family duplex dwelling house that shares one common wall with the next house. The name distinguishes this style of house from detached houses, with no shared walls, and terraced house ...

house, a type of housing * Semi-erection, a partial

erection An erection (clinically: penile erection or penile tumescence) is a physiological phenomenon in which the penis becomes firm, engorged, and enlarged. Penile erection is the result of a complex interaction of psychological, neural, vascular, ...

when the penis is enlarged but not fully erect *

Semi-final A single-elimination, knockout, or sudden death tournament is a type of elimination tournament where the loser of each match-up is immediately eliminated from the tournament. Each winner will play another in the next round, until the final matc ...

, of a knockout competition *

Semi-formal Semi-formal wear or half dress is a grouping of Western dress code, dress codes indicating the sort of clothes worn to events with a level of formality between informal wear and formal wear. In the modern era, the typical interpretation for men ...

, (esp. high school) dance *

Semi Ojeleye Jesusemilore Talodabijesu "Semi" Ojeleye ( ; born December 5, 1994) is a Nigerian-American professional basketball player for Virtus Bologna of the Italian Lega Basket Serie A (LBA) and the EuroLeague. He played college basketball for both Duke ...

(born 1994), American basketball player *

Semiquaver Figure 1. A 16th note with stem facing up, a 16th note with stem facing down, and a 16th rest. Figure 2. Four 16th notes beamed together. In music, a 1/16, sixteenth note (American) or semiquaver (British) is a note played for half the dura ...

, the time interval in music, which is half the length of a quaver *

Semi-submersible Semi-submersible may refer to a self-propelled vessel, such as: *Heavy-lift ship, which partially submerge to allow their cargo (another ship) to float into place for transport *Narco-submarine, some of which remained partially on the surface *Se ...

, a watercraft which operates mostly submerged *

Semi-trailer truck A semi-trailer truck, also known as a semitruck, (or semi, eighteen-wheeler, big rig, tractor-trailer or, by synecdoche, a semitrailer) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer ...

(UK: articulated lorry), a truck design of a tractor vehicle pulling semi-trailers **

Semi-trailer A semi-trailer is a trailer without a front axle. In the United States, the term is also used to refer to the combination of a truck and a semi-trailer; a tractor-trailer. A large proportion of a semi-trailer's weight is supported by a tracto ...

, a trailer with wheels at the rear end only **

Tractor unit A tractor unit (also known as a truck unit, power unit, prime mover, ten-wheeler, semi-tractor, tractor truck, semi-truck, tractor cab, truck cab, tractor rig, truck rig or big rig or simply a tractor, truck, semi or rig) is a characteristical ...

(semi truck engine), the motortruck engine drive unit vehicle that pulls the trailers **

Road train A road train, land train or long combination vehicle (LCV) is a trucking vehicle used to move road freight more efficiently than semi-trailer trucks. It consists of two or more trailers or semi-trailers hauled by a prime mover. History Early ...

, an extreme version of the semi truck train of trailers * Goo Semi, member of South Korean girlgroup

Cignature Cignature (; commonly stylized in all lowercase) is a South Korean girl group composed of Chaesol, Jeewon, Seline, Chloe, Belle, Semi and Dohee. Formed by C9 Entertainment and managed under their exclusive girl group sub-label J9 Entertainment,t ...

Semi Kunatani Semi Kunabuli Kunatani (born 27 October 1990) is a Fiji rugby union player. He plays for the Fiji sevens team and also Top 14 side Castres . He previously played for Top 14 side, Stade Toulousain and Premiership Rugby side Harlequins. Kunatani ...

(born 1990), Fiji rugby union player for the

Tel Aviv Heat The Tel Aviv Heat () is the first professional Israeli rugby union team. Based in Tel Aviv, the team competes annually in the Eastern Conference of the Rugby Europe Super Cup, alongside RC Batumi and The Black Lion of Georgia as well as the Roma ...

See also