A.—Acting.
a.—are, (of the French metric system.)
A. or Ans.—Answer.
A. A. G.—Assistant Adjutant-General.
A. A. P. S.—American Association for the Promotion of Science.
A. A. S.—_Academiæ Americanæ Socius_, Fellow of the American
Academy (of Arts and Sciences).
A. A. S. S.—_Americanæ Antiquarianæ Societatis Socius_, Member
of the American Antiquarian Society.
A. B.—_Artium Baccalaureus_, Bachelor of Arts.
A. B. C. F. M.—American Board of Commissioners for Foreign
Missions.
Abp.—Archbishop.
Abr.—Abridgment.
A. C.—_Ante Christum_, before the birth of Christ.
A. C.—Archchancellor.
Acct.—Account.
A. C. S.—American Colonization Society.
A. D.—_Anno Domini_, in the year of the Lord.
A. D. C.—Aide-de-camp.
Adj.—Adjective.
Adjt.—Adjutant.
Adjt. Gen.—Adjutant-General.
Ad lib.—_Ad libitum_, at pleasure.
Adm.—Admiral; Admiralty.
Adm. Co.—Admiralty Court.
Admr.—Administrator.
Admx.—Administratrix.
Ad v.—_Ad valorem_, at (or on) the value.
Adv.—Adverb.
Æt.—_Ætatis_, of age; aged.
A. F. B. S.—American and Foreign Bible Society.
A. F. & A. M.—Ancient Free and Accepted Masons.
A. G.—Adjutant-General.
Ag.—_Argentum_, silver.
Agr.—Agriculture.
A. G. S. S.—American Geographical and Statistical Society.
Agt.—Agent.
A. H.—_Anno Hegiræ_, in the year of the Hegira.
A. H. M. S.—American Home Missionary Society.
Ala.—Alabama.
Ald.—Alderman.
Alex.—Alexander.
Alg.—Algebra.
Alt.—Altitude.
A. M.—_Anno mundi_, in the year of the world.
A. M.—_Ante meridiem_, before noon; morning.
A. M.—_Artium Magister_, Master of Arts.
Amb.—Ambassador.
Amer.—American.
AMM.—_Amalgama_, amalgamation.
Amt.—Amount.
An.—_Anno_, in the year.
An. A. C.—_Anno ante Christum_, in the year before Christ.
Anat.—Anatomy.
Anc.—Ancient; anciently.
And.—Andrew.
Ang.-Sax.—Anglo-Saxon.
Anon.—Anonymous.
Anth.—Anthony.
Aor. or aor.—Aorist.
A. O. S. S.—_Americanæ Orientalis Societatis Socius_, Member of
the American Oriental Society.
Ap.—Apostle; Appius.
Ap.—_Apud_, in the writings of; as quoted by.
A. P. G. or Ast. P. G.—Professor of Astronomy in Gresham
College.
Apo.—Apogee.
Apoc.—Apocalypse.
App.—Appendix.
Apr.—April.
A. Q. M. G.—Assistant Quartermaster-General.
A. R.—_Anna Regina_, Queen Anne.
A. R.—_Anno regni_, year of the reign.
A. R. A.—Associate of the Royal Academy.
Arch.—Archibald.
Arg.—_Argumento_, by an argument drawn from such a law.
Arith.—Arithmetic.
Ark.—Arkansas.
A. R. R.—_Anno regni regis_, in the year of the reign of the
king.
A. R. S. S.—_Antiquariorum Regiæ Societatis Socius_, Fellow of
the Royal Society of Antiquaries.
Art.—Article.
A. S. or Assist. Sec.—Assistant Secretary.
A. S. A.—American Statistical Association.
A. S. S. U.—American Sunday-School Union.
Astrol.—Astrology.
Astron.—Astronomy.
A. T.—Archtreasurer.
A. T. S.—American Tract Society.
Ats.—At suit of.
Atty.—Attorney.
Atty.-Gen.—Attorney-General.
A. U. A.—American Unitarian Association.
Aub. Theol. Sem.—Auburn Theological Seminary.
A. U. C.—_Anno urbis conditæ_, or, _ab urbe conditâ_, in the
year from the building of the city (Rome).
Aug.—August.
Aur.—_Aurum_, gold.