Noun
(zoology) A small, thin, straight growth, particularly:
(obsolete) The spines of a ray.
(obsolete) The sicula of a graptolite.
(obsolete) A divining or dowsing rod.
(rare) Any small rod.
(typography, rare) Synonym of virgule: a punctuation mark.
(music, obsolete) Synonym of stem: the tail of a note.
(music, historical, obsolete) Synonym of virga: one of the neumes of medieval musical notation.
Source: en.wiktionary.orgA Y- or L-shaped twig or rod, called a dowsing rod, divining rod (Latin: virgula divina or baculus divinatorius), a "vining rod" or witching rod is sometimes used during dowsing, although some dowsers use other equipment or no equipment at all. Source: Internet
He then suggested a system of sub-units, dividing successively by factors of ten into the centuria, decuria, virga, virgula, decima, centesima, and millesima. Source: Internet