Title: Gap (American football)
Content:  The gaps on either side of the offensive center and between the guards are called "A" gaps. A gap between the offensive guard and tackle is called a "B" gap. The gaps outside the offensive tackle are called "C" gaps. If there is a tight end, the gap outside the tight end and opposite the tackle is a "D" gap.
Title: Gap (landform)
Content:   A gap is a geological formation that is a low point or opening between hills or mountains or in a ridge or mountain range. It may be called a col, notch, pass, saddle, water gap, or wind gap, and geomorphologically is most often carved by water erosion from a freshet, stream or a river. Gaps created by freshets are often, if not normally, devoid of water through much of the year, their streams being dependent upon the meltwaters of a snow pack. Gaps sourced by small springs will generally have a small stream excepting perhaps during the most arid parts of the year. Water gaps of necessity often cut entirely through a barrier range and riverine gaps may create canyons such as the riverine gaps of the Danube River, Lehigh River Gorge, the Colorado River's Grand Canyon and the Genesee River. Such cuttings may expose millennia of strata in the local rock column writing the geologic record.
Title: Gap (American football)
Content:  Gaps in American football are the spaces in between the splits of the offensive linemen. A hole is a space in between the defensive linemen.
Title: The Gap, Queensland
Content:  The Gap is 10 km by road north-west of the Brisbane GPO. The Gap was named for its geographical location in the valley between Mount Coot-tha and Enoggera Hill (i.e.  'the gap' between hills) which both form part of the Taylor Range.
Title: Glossary of cycling
Content: Gap: A distance between two or more riders large enough for drafting to no longer be effective. Also used as a verb (US English); for example: "Contador has gapped Armstrong!". It's much easier for a stronger rider to pull ahead of others once a gap has been achieved; without a gap, the others can draft along using significantly less power to sustain the same speed as the rider in front. While gaps are usually achieved through attacks, on mountain climbs, where slower speeds means the advantage of drafting is much less significant, riders are often gapped who simply cannot maintain the tempo of the faster riders. 
Title: Gap (chart pattern)
Content:  A gap is defined as an unfilled space or interval. On a technical analysis chart, a gap represents an area where no trading takes place. On the Japanese candlestick chart, a window is interpreted as a gap. In an upward trend, a gap is produced when the highest price of one day is lower than the lowest price of the following day. Conversely, in a downward trend, a gap occurs when the lowest price of any one day is higher than the highest price of the next day. For example, the price of a share reaches a high of $30.00 on Wednesday, and opens at $31.20 on Thursday, falls down to $31.00 in the early hour, moves straight up again to $31.45, and no trading occurs in between $30.00 and $31.00 area. This no-trading zone appears on the chart as a gap. Gaps can play an important role when spotted before the beginning of a move.
Title: Gap, New South Wales
Content:  Gap is a railway location in New South Wales, Australia. It is the location of the junction between the Mungindi (or North-West) railway line and the Binnaway – Werris Creek Line. A passenger platform was provided to the north of the junction between 1940 and 1971. This location has also been known as 'The Gap', one of many places in New South Wales so named.
Title: Gap (American football)
Content:  In a one-gap defensive line technique, a player is assigned a single gap to defend against the run. He does not have to line up in the gap, but he does have to be able to shed any blocker attempting to keep him from defending the gap. In a two-gap defensive technique, the defensive lineman generally has to control or defeat the offensive player in front of him to guard the run on both gaps that flank the offensive player. The gap defensive technique is older than the use of the term. In Jones and Wilkinson, when describing the nose guard play in their 5-2 defense, the authors warn that the guard must never allow the center to cut you either way (i.e. two-gap technique). All other defensive linemen are only asked to prevent their opposing linemen from blocking them in one-gap play, but they do not use the phrase 'gap' in their text.
Title: Gapping
Content: Some ate bread, and others ate rice. ; Fred likes to pet the cat, and Sally likes to pet the dog. ; Jim has been observed by me, and Tom has been observed by you. *Sam said that they spoke German, and Charlene said that they spoke Spanish. *He orders beer, and she orders wine. Canonical examples of gapping have a true "gap", which means the elided material appears medially in the non-initial conjuncts, with a remnant to its left and a remnant to its right. The elided material of gapping in all the examples below is indicated with subscripts and a smaller font:  In the first sentence, the second conjunct has the subject others, the object rice, but the verb has been 'gapped', that is, omitted. Gapping can span several verbs and nonfinite clause boundaries, as the second and third sentence illustrate, but it cannot apply across a finite clause boundary, as seen in the next sentence:  The star * indicates that the sentence is bad. Gapping is also incapable of operating backwards, which means that the antecedent to the gap must precede the gap. Attempts at gapping where the gap precedes its antecedent are quite bad, e.g. 
Title: Gap (American football)
Content:  Shooting the gap is a term used in American football. To "shoot the gap", a defensive lineman will exploit the space between the offensive linemen during a pass rush. The defensive lineman is usually one of the defensive tackles. The gaps are given different letters depending on their distance from the center. The gaps between the center and the guard are known as the "A gaps", and the gaps between the guard and the tackle are known as the "B gaps". Shooting the gap requires the defensive lineman to turn his shoulders and get past the offensive line into the backfield by any means possible, usually by diving through the gap. The play is often used during a blitz, as the defense will try to rush past the offensive line in order to get to the quarterback and cause a quarterback sack.

Question: what is the name of the gap between two front teeth?
Answer: diastema (plural diastemata).
diastema.