1. (Science: neurology) correlation involving a high degree of modifiability and also consciousness.
2. (Science: genetics) The occurrence together of two or more phenotypic characteristics more often than would be expected by change. To be distinguished from linkage.
3. In dysmorphology, the nonrandom occurrence in two or more individuals of multiple anomalies not known to be a polytopic field defect, sequence or syndrome.
Origin: L. Associatio