-a-
conjEtymology From earlier a (attested by the 14th c.), as a contraction of and and its various Middle English forms.
And
- Chem a laced well-a-fine aread1746, Exmoor Scolding, 3rd edition, section 81:
interfix, conj, infix — 5 senses
Etymology From of a (as in half-a-crown) or of (as in jack-a-napes from Middle English Jak of Naples). Some terms have fully incorporated the use, as ragamuffin and jackanape(s); others arise from mistaken assimilation to the form, as all-a-gog and cock-a-leekie.
Morpheme Connective interfix used in forming compounds, often no longer carrying a distinct meaning.
Etymology From earlier a (attested by the 14th c.), as a contraction of and and its various Middle English forms.
And
Etymology From French à (“various prepositions”) and related prepositions in other Romance languages. Also from related misunderstandings, as all-a-mort from French à la morte.
Morpheme Connective infix encountered in loanwords and phrases, generally no longer carrying a distinct meaning.
Chemistry, Natural sciences, Physical sciences Morpheme Replacing carbon, especially in a ring.
Etymology Clipping of rat.
Medicine, Pharmacology, Sciences Morpheme A monoclonal antibody derived from a rat.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.