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bilateral
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- Bilateral - a. - Having two sides; arranged upon two sides; affecting two sides or two parties.
- Bilateral - a. - Of or pertaining to the two sides of a central area or organ, or of a central axis; as, bilateral symmetry in animals, where there is a similarity of parts on the right and left sides of the body.
- Bilaterality - n. - State of being bilateral.
- Median - a. - Situated in the middle; lying in a plane dividing a bilateral animal into right and left halves; -- said of unpaired organs and parts; as, median coverts.
- Mollusca - n. pl. - One of the grand divisions of the animal kingdom, including the classes Cephalopoda, Gastropoda, PteropodaScaphopoda, and Lamellibranchiata, or Conchifera. These animals have an unsegmented bilateral body, with most of the organs and parts paired, but not repeated longitudinally. Most of them develop a mantle, which incloses either a branchial or a pulmonary cavity. They are generally more or less covered and protected by a calcareous shell, which may be univalve, bivalve, or multivalve.
- Asymmetry - n. - Want of symmetry, or proportion between the parts of a thing, esp. want of bilateral symmetry.
- Elasipoda - n. pl. - An order of holothurians mostly found in the deep sea. They are remarkable for their bilateral symmetry and curious forms.
- Bilateral - a. - Of or pertaining to the two sides of a central area or organ, or of a central axis; as, bilateral symmetry in animals, where there is a similarity of parts on the right and left sides of the body.
- Brachiolaria - n. pl. - A peculiar early larval stage of certain starfishes, having a bilateral structure, and swimming by means of bands of vibrating cilia.