five-fold symmetry
pentamerism

From the inside, a key feature is that the dome has a five-fold symmetry.

The structure displayed "five-fold symmetry" and had a slightly concave base.

It was named for the unusual twinning which produces an apparent five-fold symmetry.

The five-fold symmetry is often hard to detect in the calyx as a whole, although five food grooves are usually developed.

But one of the symmetries forbidden by classical crystalography is five-fold symmetry.

These shapes with five-fold symmetry repeat periodically, although the space between them contain other shapes that do not have a periodic pattern.

In detail the echinoderms show evidence of bilateral (mirror image) symmetry, from which five-fold symmetry was probably derived.

The specimen is preserved in its original calcite; its lack of distortion may be seen from its perfect five-fold symmetry.

Like other echinoderms they have five-fold symmetry (called pentamerism) and move by means of hundreds of tiny, transparent, adhesive 'tube feet'.

It was a mind-boggling, preconception-shattering illustration of five-fold symmetry, 'non-computability' and, quite possibly, the meaning of life."

Quasicrystals are most famous for their ability to show five-fold symmetry, which is impossible for an ordinary periodic crystal (see crystallographic restriction theorem).

The seed surface typically displays an intricate pattern with an approximate five-fold symmetry, and its five rhombic protrusions are reminiscent of primitive Buddha images.

In Five-fold Symmetry in a Cultural Context edited by Istvan Hargittai.

Moreover, such a structure was found to produce icosahedral arrays scattered through it at irregular intervals, and thus a possible explanation for five-fold symmetry was found.

In being multiple-armed, it has lost the five-fold symmetry (pentamerism) typical of starfish, although it begins with this symmetry in its life cycle.

They lack any pretence of five-fold symmetry, some are bilaterally symmetrical, but others have no obvious plane of symmetry at all, a most unusual thing for any animal.

In the Caesalpinioideae subfamily of legumes the upper petal is initially enveloped by the lateral petals, before the petals unfold to assume a radial five-fold symmetry.

In a later manuscript, in 1982, he took the optical Fourier transform of a 2-D Penrose tiling decorated with atoms, obtaining a pattern with sharp spots and five-fold symmetry.

Mackay has made important scientific contributions related to the structure of materials: In 1962 he published a manuscript that showed how to pack atoms in an icosahedral fashion; a first step towards five-fold symmetry in materials science.

The plaintiffs claim Penrose's design is distinguished by its aperiodicity (the pattern almost but never quite repeats itself) and its five-fold symmetry (a trait that at the time was thought not to exist in nature but has since been identified in certain crystal formations).

The number of appendages on most starfish, which exhibit pentamerism.

Sand colored with a velvety texture, the species expresses pentamerism or pentaradial symmetry as adults.

Like other echinoderms they have five-fold symmetry (called pentamerism) and move by means of hundreds of tiny, transparent, adhesive 'tube feet'.

Pentamerism, another variant of radial symmetry (also called pentaradial and pentagonal symmetry), means the organism is in five parts around a central axis, 72 apart.

In being multiple-armed, it has lost the five-fold symmetry (pentamerism) typical of starfish, although it begins with this symmetry in its life cycle.

The larvae of echinoderms have bilateral symmetry but this is lost during metamorphosis when their bodies are reorganised and develop the characteristic radial symmetry of the echinoderm, typically pentamerism.

The arms display pentamerism or pentaradial symmetry and comprise smaller ossicles than the stem and are equipped with cilia which facilitate feeding by moving the organic media down the arm and into the mouth.

The phylum Echinodermata, which includes starfish, sea urchins and sand dollars, is unique among animals in having bilateral symmetry at the larval stage, but fivefold symmetry (pentamerism, a special type of radial symmetry) as adults.