Definition
A Latin term meaning "a fourth part" or "quarter," appearing in two distinct legal contexts:
1. Roman law. The fourth part of any unit of number, measure, or quantity. Most commonly encountered in the context of inheritance: an heir entitled to one-quarter of an estate was designated heres ex quadrante — "heir from the quadrans." The term carried broad fractional meaning and could apply to any divisible legal interest or quantity.
2. Roman coinage. The smallest standard bronze coin of the Roman republic, equal to one-quarter of an as. Its value was roughly equivalent, in older English legal writing, to an English half-penny — though such comparisons were approximate and varied by era.
3. Old English law. A farthing; the fourth part of a penny. Before Edward I standardized coinage in England, pennies were physically cut into halves and quarters for smaller transactions. The quadrans designated the quarter-cut piece. Edward I's reign saw the introduction of purpose-struck farthings to eliminate the fraud of unequal cutting.
Common Language
Modern common usage (Wiktionary): A bronze coin of the Roman republic worth one quarter of an as.
Historical common usage (Webster's 1913): A fourth part of the coin called an as; also the fourth of a penny; a farthing.
The common and legal uses substantially overlap, but legal sources extend the term beyond its numismatic meaning. In Roman law, quadrans functions as a general fractional concept — one-quarter of any legally significant unit, not merely a coin — with particular force in inheritance law. Researchers who encounter quadrans in a legal text should not assume a monetary reference; context determines whether the term signifies a coin, a fractional share of an estate, or a measure of land or quantity.
Recognized Forms
/SUBTYPES
HERES EX QUADRANTE: An heir entitled to a one-quarter share of the inheritance under Roman law. The phrase appears in classical Roman legal sources and is carried into English legal dictionaries as a standard illustration of quadrans in the inheritance context.
QUADRANTATA TERRAE: A quarter of an acre, also called a rood. Rapalje & Lawrence records this related compound as a measure of land in old English usage. Researchers working with medieval land records may encounter this form alongside quadrans.
Why It Matters in Research
This term appears almost exclusively in historical legal sources — Roman civil law texts and old English legal materials — and rarely if ever in modern primary sources. Researchers are most likely to encounter it in one of three settings: (1) translations or commentaries on Roman law, particularly succession and inheritance materials; (2) old English legal records involving coinage, debt, or fines denominated in fractional pennies; or (3) medieval land measurement contexts, where quadrantata terrae designates a rood.
The primary research trap is treating quadrans as purely a coin. In Roman inheritance law, it is a fractional concept first. A will or legal commentary referring to a heres ex quadrante is addressing the proportional share of the estate, not a monetary amount.
A secondary trap arises with the English farthing usage. Before Edward I's coinage reform, quadrans in English records could refer to a physically cut quarter-penny rather than a struck coin — a distinction that matters when interpreting debt instruments or fine records from that period.
The term also connects to the broader Roman fractional inheritance system, in which the as (the whole) was divided into twelve unciae (ounces), and quadrans represented three of those twelve parts. Researchers working with Roman succession law should be comfortable with this duodecimal framework to understand how quadrans fits within the larger system.
Historical Dictionary Support
The four source dictionaries are largely in agreement on the core meanings, with differences in emphasis and coverage. Black's (both editions) and Burrill cover the English farthing meaning directly and note the historical practice of cutting pennies before Edward I's reform. Black's 2nd edition is slightly more complete on the English law side, explicitly flagging the old English usage as distinct from the Roman law meaning.
Rapalje & Lawrence takes the most concise approach to quadrans itself but usefully records quadrantata terrae as a related land-measure term — an association the other dictionaries omit. This makes Rapalje & Lawrence a better reference for researchers working in medieval English property or agricultural records.
What the historical dictionaries largely pass over is the structural role of quadrans within Roman fractional inheritance doctrine. The heres ex quadrante illustration is offered, but the relationship between quadrans and the duodecimal as-system is not explained. Researchers needing that context must look beyond the dictionary shelf to Roman law treatises and civil law commentaries.
None of the source dictionaries provide meaningful jurisdictional guidance, which is appropriate — this is a historical legal term without modern jurisdictional variation.