The Collaborative International Dictionary of English v.0.48:
Arabic \Ar"a*bic\, a. [L. Arabicus, fr. Arabia.]
Of or pertaining to Arabia or the Arabians.
Arabic numerals or figures, the nine digits, 1, 2, 3,
etc., and the cipher 0.
Gum arabic. See under Gum.
Bouvier's Law Dictionary, Revised 6th Ed (1856):
FIGURES, Numerals. They are either Roman, made with letters of the Alphabet,
for example, MIDCCLXXVI; or they are Arabic, as follows, 1776.
2. Roman figures may be used in contracts and law proceedings, and they
will be held valid; but Arabic figures, probably owing to the case with
which they may be counterfeited, or. altered, have been holden not to be
sufficient to express the sum due on a contract; but, it seems, that if the
amount payable and due on a promissory note be expressed in figures or
ciphers, it will be valid. Story on Bills, Sec. 42, note; Story, Prom.
Notes, Sec. 21. Indictments have been set aside because the day or year was
expressed in figures. 13 Vin Ab. 210; 1 Ch. Rep. 319; S. C. 18 Eng. Com. Law
3. Bills of exchange, promissory notes, cheeks and agreements of every
description, are usually dated with Arabic figures; it is, however, better
to date deeds and other formal instruments, by writing the words at length.
Vide l Ch. Cr. L. 176; 1 Verm. R. 336; 5 Toull. n. 336; 4 Yeates, R. 278; 2
John. R. 233; 1 How. Mis. 256; 6 Blackf., 533.