Herodias = "heroic"
1) daughter of Aristobulus and granddaughter of Herod the Great. She was first married to Herod Philip I, son of Herod the Great, a man in private life; but afterwards formed an unlawful union with Herod Antipas, whom she induced not only to slay John the Baptist but also to make the journey to Rome which ruined him; at last she followed him to exile in Gaul.
Part of Speech: noun proper feminine
From G2264; Herodias, a woman of the Herodian family: - Herodias.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root Ἡρῳδιάς; click on the second column to search for that grammatical form of the root Ἡρῳδιάς; click on the third column to search for that word and grammatical form; click on the total to search for the root Ἡρῳδιάς.