Likewise, a type collection might focus on an unusual design feature such as coins with a hole in the middle, coins that are not circular in shape or coins with brockage.

Modern velodromes feature steeply banked oval tracks, consisting of two 180-degree circular bends connected by two straights.

In the Middle Ages, cathedrals and great churches throughout Western Europe were fitted with a peculiar architectural feature known as a Holy Ghost hole ; a small circular opening in the roof that symbolized the entrance of Holy Spirit into the midst of the assembled worshippers.

All figs possess a white to yellowish sap ( latex ), some in copious quantities ; the twig has paired stipules or a circular stipule scar if the stipules have fallen off ; and the lateral veins at the base of the leaf are steep, forming a tighter angle with the midrib than the other lateral veins, a feature referred to as a " tri-veined ".

What they reported as a circular feature later turned out to be a crater estimated to be in diameter.

* The small Sacred Lake in its circular bowl, now intentionally left dry by the island's caretakers to suppress disease spreading bacteria, is a topographical feature that determined the placement of later features.

The most noted feature in its structure is its circular shape, unique in Spain.

The Mill Race log flume was removed from the park, and the circular Calypso was relocated to make room for Raptor, the first inverted roller coaster to feature a Cobra Roll.

A radially-aligned line with arrowhead pointing to the circular feature, called a leader, is used in conjunction with both diametral and radial dimensions.

The dark circular feature which dominates this mare is the crater Thomson ( 112 km diameter ), with the overflow from Ingenii / Thomson directly to the east.

The circular Temple Portico that extends into the space of the Saloon is a prominent architectural feature of the house, and one of Thornton's trademarks

Further north is a long, narrow rectangular feature known as the Banqueting Hall ( Teach Miodhchuarta ), although it is more likely to have been a ceremonial avenue or cursus monument approaching the site, and three circular earthworks known as the Sloping Trenches and Gráinne's Fort.

* German: topographic name for someone who lived by a circular feature, from Middle Low German kreis ( Middle High German kreiz ) ‘ circle ’.

Large circular structures involving carved megalithic orthostats are a typical feature, e. g. at Nevali Cori and Göbekli Tepe.

Islamic influence can also be traced in the mainstream of Western medieval art, for example in the Romanesque portal at Moissac in southern France, where it shows in both decorative elements, like the scalloped edges to the doorway, the circular decorations on the lintel above, and also in having Christ in Majesty surrounded by musicians, which was to become a common feature of Western heavenly scenes, and probably derives from images of Islamic kings on their diwan.

For telescopes with circular apertures, the size of the smallest feature in an image that is diffraction limited is the size of the Airy disc.

The Richat Structure, also known as the Eye of the Sahara and Guelb er Richat, is a prominent circular feature in the Sahara desert of west – central Mauritania near Ouadane.

The most prominent landscaping feature in London's historic Highgate Cemetery is its " Circle of Lebanon ", where a Lebanon Cedar stands in the centre of a circular trench cut into the ground and lined with mausoleums.

The German astronomers Wilhelm Beer and Johann Heinrich Mädler selected a small circular feature as a reference point when they produced the first systematic chart of Mars features in 1830-32.

These are clearly seen as circular vesicles and together with the pouch are often used as a diagnostic feature of the group.

Verandahs were usually a feature, as were the image of the rising sun and Australian wildlife ; plus circular windows, turrets and towers with conical or pyramid-shaped roofs.

Later corridor coaches have, however, been distinguished by the name " Porthole " stock by virtue of the circular toilet window feature which they introduced.

Clearly inspired by its older namesake in Bath, it differs from the Bath crescent in that it is not a true crescent at all but two quadrant terraces each terminated by a circular bow in the Regency style which rises as a tower, a feature which would not have been found in the earlier classically inspired architecture of the 18th century which the design of the crescent seeks to emulate.

280 specimens ): showing an animal triskele under a circular feature

The genome is circular and with 24, 893 nucleotides is currently the largest known ssDNA genome.

If one concept is defined by another, and the other is defined by the first, this is known as circular definition, somewhat similar to a circular reasoning: neither offers us any enlightenment about what we wanted to know.

If the network is one-dimensional, and the chain of nodes is connected to form a circular loop, the resulting topology is known as a ring.

At the end of 2003, GCHQ moved to a new circular HQ ( popularly known as ' the Doughnut '): at the time, it was the second-largest public-sector building project in Europe, with an estimated cost of £ 337 million.

The γ-tubulin combines with several other associated proteins to form a circular structure known as the " γ-tubulin ring complex " ( γ-TuRC ).

* a circular treatment center ( sometimes known as the Temple of Telesphorus )

In computer interface design, a pie menu ( also known as a radial menu ) is a circular context menu where selection depends on direction.

The earliest known official or large-scale celebration of Pi Day was organized by Larry Shaw in 1988 at the San Francisco Exploratorium, where Shaw worked as a physicist, with staff and public marching around one of its circular spaces, then consuming fruit pies.

* Ring ( data structure ), also known as ring buffer or circular buffer

Before then, it was known as Kallístē ( Καλλίστη, " the most beautiful one "), Strongýlē (, " the circular one "), or Thēra.

This speed along a circular path is known as tangential speed because the direction of motion is tangent to the circumference of the circle.

The polarization dependent phase shift is long known and was used by Fresnel to design the Fresnel rhomb which allows to transform circular polarization to linear polarization and vice versa for a wide range of wavelengths ( colors ), in contrast to the quarter wave plate.

An equivalent situation arises in engineering and science known as circular reference, in which a parameter is required to calculate that parameter itself.

For a circular aperture, the diffraction-limited image spot is known as an Airy disk ; the distance x in the single-slit diffraction formula is replaced by radial distance r and the sine is replaced by 2J < sub > 1 </ sub >, where J < sub > 1 </ sub > is a first order Bessel function.

Well known manifestations of this effect appear in optical wave plates / retarders ( linear modes ) and in Faraday rotation / optical rotation ( circular modes ).

Section II ( Propositions 1-10 ) establishes relationships between centripetal forces and the law of areas now known as Kepler's second law ( Proposition 1-3 ), and relates circular velocity and radius of path-curvature to radial force ( Proposition 4 ), and relationships between centripetal forces varying as the inverse-square of the distance to the center and orbits of conic-section form.

Nearly half of its surface area was occupied by the state's own circular exhibit " Century 21 — The Threshold and the Threat ," also known as the " World of Tomorrow " exhibit ," a " 21-minute tour of the future.

This is known as circular dichroism.

For the case of acceleration perpendicular to the velocity () ( a case that arises in circular particle accelerators known as synchrotrons ), the total power radiated reduces to

In a rotating black hole, also known as a Kerr black hole, the singularity occurs on a ring ( a circular line ), known as a " ring singularity ".

Unusually fine for their early date, and with a remarkably rich survival of evidence, these sites stand as a visible symbol of the achievements of early peoples away from the traditional centres of civilisation ... The Ring of Brodgar is the finest known truly circular late Neolithic or early Bronze Age stone ring and a later expression of the spirit which gave rise to Maeshowe, Stenness and Skara Brae

* The Neolithic monument Stonehenge is built in England near Salisbury, Wiltshire, comprising a circular earthwork 97. 5 m / 320 ft in diameter with 56 small pits around the circumference ( later known as the Aubrey holes ).