CIPHER n.
A private alphabet, system of characters, or other mode of writing, contrived for the safe transmission of secrets; also, a writing in such characters. His father . . . engaged him when he was very young to write all his letters to England in cipher. Bp. Burnet. Cipher key, a key to assist in reading writings in cipher…
COMMERCIAL a.
d business. -- Commercial law. See under Law. -- Commercial note paper, a small size of writing paper, usually about 5 by 7½ or 8 inches. -- Commercial paper, negotiable paper given in due course of business. It includes bills of exchange, promissory notes, bank cheks, etc. -- Commercial traveler, an agent of a who…