Definition
"Derentivadum" does not appear to be a recognized legal term. The source material attributed to Burrill's Law Dictionary contains no substantive entry for this word. The fragment provided — "Dertford in Kent. shire, and the adjacent districts. DERWENTIO, Derventio. Auldby upon" — is plainly a mis-indexed or corrupted passage from entries for nearby headwords (likely DERTFORD or DERWENTIO), not a definition of "Derentivadum" itself.
This term is not found in Black's Law Dictionary, Bouvier's Law Dictionary, Tomlin's Law Dictionary, Jacob's Law Dictionary, or any other standard historical or modern legal reference work in the Law Mind corpus. It does not correspond to a recognized Latin, Law French, or Anglo-Norman legal term. It may represent a scanning artifact, typographical corruption, or transcription error in the digitized source.
Why It Matters in Research
Researchers encountering "derentivadum" in a historical document or database search result should treat it as a flag for source corruption rather than as a genuine term of art. Digitized legal dictionaries — including older editions of Burrill — are susceptible to OCR errors that can generate plausible-looking Latin-form words from fragmentary or damaged text. A search returning this term is more likely a pointer to a neighboring entry (such as DERWENTIO or DERTFORD, both of which appear to be place-name entries relating to English geography) than evidence of a substantive legal concept.
If you encountered this term in a primary source rather than a reference work, the recommended research path is: (1) verify the physical or facsimile source to rule out transcription error; (2) consult a Latin legal glossary and Du Cange's Glossarium for medieval Latin variants; (3) consider whether the term may be a corrupted form of a known Latin legal phrase beginning with "de re" or "de renti-."
No reliable legal meaning can be assigned to this term on the available evidence.
Historical Dictionary Support
Burrill's Law Dictionary, the sole source provided, yields no usable definition. The text fragment supplied is a passage from unrelated adjacent entries and was apparently mis-associated with this headword. No other historical legal dictionary in the Law Mind corpus contains an entry for "derentivadum." Researchers should not treat the Burrill fragment as evidence that this term had a recognized legal meaning.