2. Infix. Connective infix (used in forming compounds), generally no longer carrying meaning. ¹
3. Infix. Replacing carbon especially in a ring. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of -a-
'zounds (aq) (s)he *nices *nix *nixes ++ ++good ++ungood +1 | +ve -'d -'er -0r -a -a- (current term) -a-palooza -a-thon -ab -ability | -able -ably -ac -acea -acean -aceous -acity -ad -ade -adelic |