Bilateral symmetry
a basic body plan in which the left and right sides of the organism can be divided into approximate mirror images of each other along the midline.
historical examples
elementary zoology, second edition vernon l. kellogg
the works of francis maitland balfour, volume iii (of 4) francis maitland balfour
the works of francis maitland balfour, volume ii (of 4) francis maitland balfour
the sea-beach at ebb-tide augusta foote arnold
harvard psychological studies, volume 1 various
harvard psychological studies, volume 1 various
report on the radiolaria collected by h.m.s. challenger during the years 1873-1876, second part: subcl-ss osculosa; index ernst haeckel
the works of francis maitland balfour, volume ii (of 4) francis maitland balfour
over the teacups oliver wendell holmes, sr.
the whence and the whither of man john mason tyler
noun
the property of an organism or part of an organism such that, if cut in only one plane, the two cut halves are mirror images of each other see also radial symmetry
bilateral symmetry
(bī-lāt’ər-əl)
symmetrical arrangement of an organism or part of an organism along a central axis, so that the organism or part can be divided into two equal halves. bilateral symmetry is a characteristic of animals that are capable of moving freely through their environments. compare radial symmetry.
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pertaining to, involving, or affecting two or both sides, factions, parties, or the like: a bilateral agreement; bilateral sponsorship. located on opposite sides of an axis; two-sided, especially when of equal size, value, etc. biology. pertaining to the right and left sides of a structure, plane, etc. chiefly law. (of a contract) binding the parties […]
- Bilayer
a structure composed of two molecular layers, especially of phospholipids in cellular membranes.
- Bilection
bolection. noun another word for bolection
- Bilinear
of, relating to, or having reference to two lines: bilinear coordinates. of the first degree in each of two variables, as an equation. adjective of or referring to two lines of or relating to a function of two variables that is linear in each independently, as f(x, y) = xy adj.
- Bilinear form
a function or functional of two variables that is linear with respect to each variable when the other variable is held fixed.