| parallel e. |
the independent evolution of similar structures in two or more rather closely related organisms.
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| parallel f.’s |
axons of granule cells in the cerebellum that cross the molecular layer at a right angle and synapse with gemmules of Purkinje cell dendrite; many thousands of parallel fibers may innervate a single Purkinje cell.
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| parallel g. |
in radiography, one in which the lead strips are oriented parallel to each other; rather than angled as in a focused grid.
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| parallel r.’s |
rays which come from a source at an infinite distance; divergent rays may be made parallel by means of a convex lens or a concave mirror.
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| parallelometer |
an instrument for determining the exact parallel relationships of lines, surfaces, and structures in dental prostheses and casts.
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