Definition
In historical English law and ceremonial usage, a cappa is a cap — specifically, a physical cap presented as part of the formal investiture of a nobleman. The term appears in old records principally in the compound form cappa honoris (cap of honor), which denoted one of the prescribed solemnities attending the creation of an earl or marquis. The cap was a tangible symbol of rank, conferred alongside other ceremonial objects (such as a sword or mantle) as part of the investiture ritual by which the Crown formally vested a peer with his dignity and privileges.
Common Language
Modern common usage (Wiktionary): In botany, cappa refers to the thick wall on the proximal side of the corpus of a pollen grain — a term belonging entirely to plant morphology.
Historical common usage (Webster's 1913): Webster's 1913 does not carry a standalone entry for cappa, reflecting its status as a Latin term that had largely receded from active English usage by that period.
Editorial note: The legal meaning of cappa has no meaningful connection to its modern botanical usage. A researcher encountering the term in historical legal records should treat it as a Latinate term of art drawn from English peerage ceremony, not as a word carrying any of its scientific or ordinary-language associations.
Why It Matters in Research
Cappa is a narrow archival and ceremonial term. Researchers are most likely to encounter it in records touching on the creation of peers — patent rolls, heralds' records, orders of ceremony, or treatises on the law of nobility and dignities. Its appearance signals a document concerned with the formal mechanics of peerage creation rather than substantive legal rights.
The key research trap is treating cappa as a generic descriptor. In context, cappa honoris was not merely decorative language; it referred to a specific ceremonial act with legal significance, because the investiture ceremony as a whole was what formally constituted the dignity. Missing or incomplete solemnities could bear on questions of whether a peerage had been lawfully and completely conferred — a matter that surfaced in historical parliamentary disputes over the validity of peerages.
Researchers working with Law Mind sources on English nobility, heraldry, or constitutional history should note that cappa will appear almost exclusively in Latin or Law Latin passages within older records. It does not migrate into modern legal usage. Neither Black's edition covers the term beyond its brief entry, and no American legal context is relevant.
Historical Dictionary Support
Both Black's Law Dictionary and the Second Edition carry identical, minimal entries: "In old records. A cap. Cappa honoris, the cap of honor. One of the solemnities or ceremonies of creating an earl or marquis." The entries agree completely and offer no divergence to analyze. What they share is their brevity — neither source elaborates on the legal significance of the investiture ceremony, the other solemnities with which the cappa honoris was associated, or the consequences of its omission. Researchers needing deeper treatment must look beyond the Black's entries to treatises on English peerage law and heraldic practice. The historical dictionaries are useful for identification of the term but thin on context.
Jurisdictional Note
Cappa is exclusively a term of English law and peerage ceremony. It has no relevance to American, Scottish, or other common law jurisdictions as a legal term of art.