RODA

Definition

A rod or perch; a unit of land measurement used in old English law. The roda was a linear and area measure employed in conveyancing, survey, and land description, functioning as one of the standard units by which parcels of land were quantified in medieval English legal instruments. As a measure of length, the rod or perch was traditionally fixed at 16½ feet; as a unit of area, it referred to a square rod. The term appears in Latin legal records and instruments alongside related measures such as the acre and the furlong.

Common Confusion

RODA / ROD / PERCH: The three terms — roda, rod, and perch — refer to the same underlying unit of measure and are used interchangeably across historical sources. Confusion arises because the word perch was also used in entirely unrelated contexts (a roosting bar, a fish), and because the precise length of the rod varied by local custom in different periods. Researchers encountering roda in a medieval Latin document should treat it as equivalent to the rod or perch of English surveying practice, while remaining alert to regional variation in the actual measurement.

Why It Matters in Research

Roda appears almost exclusively in medieval Latin legal instruments — charters, conveyances, inquisitions post mortem, and manorial records — and will not be found in modern legal documents. Researchers working with early land records need to recognize it as a unit of measurement rather than a place name or party designation, which its Latin form can obscure at first glance. The practical research trap is twofold. First, the rod as a unit was not uniform across all periods and localities; local custom could produce modest variation in the actual length, meaning that a roda in one county's records does not always map precisely onto a roda in another's. Second, Burrill's entry groups roda with the immediately following entry for RODKNIGHTS, a feudal tenure term of entirely different character. Researchers scanning Burrill alphabetically should not conflate these adjacent entries — the measurement term and the tenure term share only their proximity on the page. For corpus researchers tracing land descriptions across time, roda connects upward to the larger system of English customary measures (acre, furlong, hide, virgate) that structured medieval and early modern conveyancing, and connects laterally to the Latin vocabulary of survey and extent — pertica being the classical Latin equivalent that also appears in some records.

Historical Dictionary Support

Burrill's entry is brief and purely definitional: "A rod, or perch. A measure of land," with attribution to Spelman. The entry does no more than identify the term, equate it to its English equivalents, and note its character as a land measure. Burrill does not provide a specific fixed length, nor does he address regional variation — a gap that researchers should fill by consulting historical treatises on English weights and measures. Spelman's Glossarium Archaeologicum, cited by Burrill, is the primary authority behind this entry and remains the appropriate source for deeper investigation of the term's usage in medieval records. The brevity of Burrill's treatment reflects the term's limited legal complexity: roda is a technical measurement word, not a doctrine or right, and the historical dictionaries treat it accordingly.

Jurisdictional Note

Roda is a term of old English law and appears in English and Welsh historical land records. It has no direct equivalent usage in American legal documents, though the rod as a unit of survey measure continued in American practice through the nineteenth century, sometimes appearing in deeds and plats without the Latin form.

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