Bilateral

Bilateral may refer to any concept including two sides, in particular:

Symmetry in biology

Symmetry in biology is the balanced distribution of duplicate body parts or shapes within the body of an organism. In nature and biology, symmetry is always approximate: for example plant leaves, while considered symmetrical, rarely match up exactly when folded in half. Symmetry creates a class of patterns in nature, where the near-repetition of the pattern element is by reflection or rotation. The body plans of most multicellular organisms exhibit some form of symmetry, whether radial, bilateral, or spherical. A small minority, notably among the sponges, exhibit no symmetry (i.e., are asymmetric).

Radial symmetry

Radially symmetric organisms resemble a pie where several cutting planes produce roughly identical pieces. Such an organism exhibits no left or right sides. They have a top and a bottom surface only.

Symmetry has been important historically in the taxonomy of animals; animals with radial symmetry were classified in the taxon Radiata, which is now generally accepted to be a polyphyletic assemblage of different phyla of the Animal kingdom. Most radially symmetric animals are symmetrical about an axis extending from the center of the oral surface, which contains the mouth, to the center of the opposite, or aboral, end. Radial symmetry is especially suitable for sessile animals such as the sea anemone, floating animals such as jellyfish, and slow moving organisms such as starfish. Animals in the phyla cnidaria and echinodermata are radially symmetric, although many sea anemones and some corals have bilateral symmetry defined by a single structure, the siphonoglyph.

Bilateral (album)

Bilateral is the second studio album released by the Norwegian progressive metal band, Leprous. It was recorded in Ivory Shoulder Studios and Juke Joint Studio by Vegard Tveitan and Heidi Solberg Tveitan, and mixed and mastered at Fascination Street Studio by Jens Bogren. Additional editing by Ivar Barstad. The music is arranged by the whole band and the lyrics are the work of Einar Solberg, Øystein Landsverk and Tor Oddmund Suhrke. Art direction and design by Ritxi Ostáriz. Cover painting by Jeff Jordan. All songs published by Magic Art Publishing.

In order to define the band's vision about music and what it means to be progressive, guitarist Tor Oddmund Shurke provided his insight on this matter and other subjects in an interview with the monthly music magazine Guitar World.

The album features guest vocals by Ihsahn on the 4th track of the album, Thorn and the trumpet on Thorn and Painful Detour are played by Vegard Sandbukt. Trumpet and additional keyboards were recorded in Kulturkirken Jacob, in Oslo by Rune Børø.