n 1  :  a reversal of position, order, form, or relationship: as  a  :  a dislocation of a bodily structure in which it is turned partially or wholly inside out < of the uterus>   b  :  the condition (as of the foot) of being turned or rotated inward - compare EVERSION2    c  :  RETROFLEXION  d  :  a breaking off of a chromosome section and its subsequent reattachment in inverted position : also  :  a chromosomal section that has undergone this process  2 a  :  the conversion of dextrorotatory sucrose into a levorotatory mixture of glucose and fructose  b  :  a change from one stereochemical figuration at a chiral center in a usu. organic molecule to the opposite configuration that is brought about by a reaction in which a substitution of one group is made for a different group  3  :  HOMOSEXUALITY .
 
   
 
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