Definition
A Latin term from the old common law vocabulary meaning defect, deficiency, want, failure, or disqualification. Defectus appears in legal texts primarily as a component of Latin phrases rather than as a standalone term, and its meaning shifts depending on the phrase in which it appears. Two constructions appear most frequently in historical sources:
1. Defectus exitus — failure or default of issue; the absence of heirs of the body. Used in property and inheritance contexts to describe the condition triggering a reversion or forfeiture of land held in fee tail.
2. Defectus sanguinis — failure of blood; want of heritable blood. A broader formulation covering situations where inheritance fails due to the absence of qualifying lineal or collateral heirs.
The term also appears in the procedural context of jury challenges, most notably in the phrase challenge propter defectum — a challenge to a prospective juror grounded on a legal disqualification rather than on partiality or cause specific to the case. Grounds for such a challenge included infancy, alienage, lack of property qualification, or other status-based incapacities that rendered the person legally incompetent to serve.
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Common Confusion
Defectus should not be confused with defectus juris, a phrase sometimes used in equity and conflict-of-laws contexts to mean a gap or deficiency in the law itself. The word defectus carries the same root meaning in each phrase, but the subject of the deficiency — an heir, a juror's qualifications, or the law — changes the legal consequence entirely. Researchers encountering defectus in historical sources should identify the accompanying noun before drawing conclusions about context or doctrine.
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Recognized Forms
/SUBTYPES
Defectus exitus: Default of issue. Found in fee tail instruments, entail litigation, and inheritance pleading. Triggers reversion to the grantor or the grantor's heirs when a grantee's lineal issue fails.
Defectus sanguinis: Failure of blood. Applied in succession law when the entire line of heritable descent is extinguished, leaving no one capable of inheriting under the applicable rules of consanguinity.
Challenge propter defectum: A jury challenge based on the prospective juror's legal disqualification. Distinct from a challenge propter affectum (partiality) or propter delictum (prior conviction of an infamous offense).
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Why It Matters in Research
Defectus is a term of navigation, not substance. Researchers will rarely encounter it standing alone; they will encounter it embedded in Latin maxims, pleading forms, and property instruments from the medieval through early modern English legal tradition. The practical research task is parsing the compound phrase correctly.
Several traps await researchers working in historical sources. First, fee tail instruments and entail pleadings use defectus exitus as a term of art with precise consequences under the Statute De Donis Conditionalibus (1285) and its successors. The presence or absence of defectus exitus in a conveyancing instrument determined whether land passed, reverted, or escheated — meaning even a marginal annotation containing the phrase may carry doctrinal weight. Second, the challenge propter defectum appears in English and early American trial records as a routine procedural notation, but researchers unfamiliar with the taxonomy of jury challenges may misread it as a challenge for cause going to bias. It was not; it was a status-based disqualification, a categorical exclusion rather than a case-specific objection. Third, defectus sanguinis connects to the doctrine of escheat and to the rules governing alien inheritance, both of which varied substantially across American jurisdictions through the nineteenth century and are poorly indexed in modern finding tools.
In the Law Mind corpus, defectus is most likely to surface in pleading treatises, real property instruments, and early American and English jury trial practice materials. Townsend's Pleadings (cited by Burrill) is a primary source for defectus exitus in the context of issue failure.
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Historical Dictionary Support
Burrill and Black agree on the core semantic range of defectus: defect, deficiency, want, failure, imperfection, disqualification. Neither source treats the term as independently operative; both present it through its compounds. Burrill emphasizes the pleading context, directing the reader to propter defectum as the entry where the doctrinal content resides. Black organizes similarly, giving the two main compound forms — challenge propter defectum and defectus sanguinis — as the operative entries.
Neither dictionary provides substantive treatment of defectus exitus beyond a bare citation in Burrill; researchers needing the doctrine of failure of issue should work from the property and entail entries in those sources, and from specialized treatises on fee tail and real property pleading. The historical dictionaries are useful here primarily for confirming that defectus is a building-block term rather than a self-contained doctrine, and for routing the researcher toward the correct compound phrase.
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Jurisdictional Note
The challenge propter defectum became largely obsolete in American practice as statutory qualifications replaced common law status-based disqualifications for jury service. Defectus sanguinis and defectus exitus retain historical relevance in jurisdictions that abolished fee tail by statute, as the abolition statutes frequently reference the conditions — including failure of issue — that the older tenure system addressed.
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