Late 19th century. From abasia + -ic, after French abasique.
abasic2
/eɪˈbeɪsɪk/
Molecular Biol.
adjective
Of a nucleotide: lacking a purine or pyrimidine base. Of DNA, or a specific site in a sequence of nucleotides: containing a nucleotide or nucleotides of this type.
Origin
1980s; earliest use found in Mutation Research. From a- + basic.