Definition
A Latin term meaning "a name" or "a word used as a name." In legal contexts, vocabulum refers to the formal designation or appellation of a thing — the name by which a legal subject, object, or concept is properly identified. The phrase vocabulum rerum, drawn from the sources, means "the names of things," signifying the proper nomenclature applied to legal subjects and objects.
The term carries the sense of a technical or authoritative label rather than a casual descriptor. Where a legal instrument, pleading, or treatise employed vocabulum, it pointed to the precise word by which something was to be known for legal purposes — a concern of practical importance in an era when misnaming a party, thing, or action could be fatal to a legal proceeding.
Why It Matters in Research
Researchers will encounter vocabulum most often in medieval and early modern Latin legal texts, particularly in treatises on pleading and procedure where exact naming conventions governed the validity of writs and actions. The term signals a passage concerned with technical nomenclature — how a thing must be called, not merely what it is.
The reference in Burrill to Fleta, lib. 4, c. 10, § 11 places this term squarely in the tradition of English legal Latin treatises from the late thirteenth century. Fleta, composed circa 1290, drew heavily on Bracton and was a working manual for practitioners. When Fleta invokes vocabulum rerum, it is addressing the practical problem of correct legal denomination — a concern that runs through pleading doctrine well into the early modern period.
Researchers working with Year Books, early common law pleadings, or Latin writs should treat vocabulum as a marker for discussions of naming precision. Misidentification of a party or subject in a writ was grounds for abatement; the proper vocabulum was not a stylistic concern but a jurisdictional one.
The term is rarely encountered in post-seventeenth-century English legal sources, as Latin pleading declined and was formally abolished in English courts by statute in the eighteenth century. Researchers reading nineteenth-century American or English legal dictionaries will find vocabulum treated as a historical curiosity rather than a live term of art.
Historical Dictionary Support
Burrill's Law Dictionary provides the foundational entry: vocabulum means "a name," citing to Fleta for the phrase vocabulum rerum — the names of things. The entry is brief, as suits a term whose primary function was technical and taxonomic rather than doctrinal.
Burrill does not elaborate on the procedural stakes of proper naming, nor does he trace the term's use through pleading doctrine. This is a gap worth noting: the significance of vocabulum in practice was not merely definitional but operational. Latin legal writing treated the proper name of a thing as a condition of valid legal action, a principle that Fleta and Bracton both address in the context of pleading requirements.
No substantive divergence among historical sources is apparent, as the term's meaning is stable and narrow. The limitation of the historical dictionary record here is one of depth rather than disagreement.