Medical Definition of Sign of elongation
1.
Referring to the elongation of a substance in relation to refractive indices. If it is elongated in the direction of the high refractive index, it is said to have a positive sign of elongation. If it is elongated in the direction of the low refractive index, it has a negative sign of elongation, not to be confused with the sign of double refraction (i.e., optic sign).
(05 Aug 1998)
Lexicographical Neighbors of Sign Of Elongation
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