What is Alias Dictus?

Legal Definition
"Otherwise called." This phrase (or its shorter and more usual form, alias,) when placed between two names in a pleading or other paper indicates that the same person is known by both those names. A fictitious name assumed by a person is colloquially termed an "alias." Ferguson v. State, 134 Ala. 63, 32 South. 760, 92 Am. St. Rep. 17; Turns v. Co.m., 6 Mete. (Mass.) 235; Kennedy v. People, 1 Cow. Or. Rep. (N. Y.) 119.
-- Black's Law Dictionary
Legal Definition
Otherwise called or known as.
-- Ballentine's Law Dictionary