Dagger and double dagger
A dagger or obelisk ( † ) is a typographical symbol usually used to indicate a footnote if an asterisk has already been used. It is present in Unicode as U+2020 † dagger (HTML
†). The term "obelisk" derives from the Greek ὀβελίσκος (obeliskos), which means "little obelus"; from ὀβελός (obelos) meaning "roasting spit". It was originally represented by the subtraction ( - ) and division ( ÷ ) symbols by Ancient Greek scholars as critical marks in manuscripts.
A double dagger or diesis (‡) is a variant with two handles that is usually used for a third footnote after the asterisk and dagger. In Unicode, it is encoded as U+2021 ‡ double dagger (HTML
The dagger symbol originated from a variant of the obelus (plural: obeli), originally depicted by a plain line (-) or a line with one or two dots (÷). It represented an iron roasting spit, a dart, or the sharp end of a javelin, symbolizing the skewering or cutting out of dubious matter.
The obelus is believed to have been invented by the Homeric scholar Zenodotus as one of a system of editorial symbols. They were used to mark questionable or corrupt words or passages in manuscripts of the Homeric epics. The system was further refined by his student Aristophanes of Byzantium, who first introduced the asterisk and used a symbol resembling a ⊤ for an obelus; and finally by Aristophanes' student, in turn, Aristarchus, from whom they earned the name of 'Aristarchian symbols'.
While the asterisk (asteriscus) was used for corrective additions, the obelus was used for corrective deletions of invalid reconstructions. It was used when non-attested words are reconstructed for the sake of argument only, implying that the author did not believe such a word or word form had ever existed. Some scholars used the obelus and various other critical symbols, in conjunction with a second symbol known as the metobelos ("end of obelus"), variously represented as two vertically arranged dots, a γ-like symbol, a mallet-like symbol, or a diagonal slash (with or without one or two dots). They were used to indicate the end of a marked passage.
It was used much in the same way by later scholars to mark differences between various translations or versions of the Bible and other manuscripts. The early Christian Alexandrian scholar Origen (c. 184 – 253 AD) used it as a method of indicating differences between different versions of the Old Testament in his Hexapla. Epiphanius of Salamis (c. 310–320 – 403) used both a horizontal slash or hook (with or without dots) and an upright and slightly slanting dagger to represent an obelus. St. Jerome (c. 347 – 420) used a simple horizontal slash for an obelus, but only for passages in the Old Testament. He describes the use of the asterisk and the dagger as: "an asterisk makes a light shine, the obelisk cuts and pierces."
Isidore of Seville (c. 560 – 636) described the use of the symbol as follows: "The obelus is appended to words or phrases uselessly repeated, or else where the passage involves a false reading, so that, like the arrow, it lays low the superfluous and makes the errors disappear... The obelus accompanied by points is used when we do not know whether a passage should be suppressed or not."
Medieval scribes used the symbols extensively for critical markings of manuscripts. In addition to this, the dagger was also used in notations in early Christianity, to indicate a minor intermediate pause in the chanting of Psalms, equivalent to the quaver rest notation. It is also used to indicate a breath mark when reciting, along with the asterisk, it is thus frequently seen beside a comma.
In the sixteenth century, the printer and scholar Robert Estienne (also known as Stephanus in Latin and Stephens in English) used it to mark differences in the words or passages between different printed versions of the Greek New Testament (Textus Receptus).
The obelus was also occasionally used as a mathematical symbol for subtraction. It was first used as a symbol for division by the Swiss mathematician Johann Rahn in his book Teutsche Algebra in 1659. This gave rise to the modern mathematical symbol ÷.
Due to the variations as to the different uses of the different forms of obeli, there is some controversy as to which symbols can actually be considered obeli. The lemniscus (÷) and its variant, the hypolemniscus (⨪), is sometimes considered to be different from other obeli. And obeli may have referred strictly only to the horizontal slash and the dagger symbols.
The dagger is usually used to indicate a footnote if an asterisk has already been used. A third footnote employs the double dagger. Additional footnotes are somewhat inconsistent and represented by a variety of symbols, e.g., parallels (‖) and the pilcrow (¶), some of which were nonexistent in early modern typography. Partly because of this, superscript numerals have increasingly been used in modern literature in the place of these symbols, especially when several footnotes are required. Some texts use asterisks and daggers alongside superscripts, using the former for per-page footnotes and the latter for endnotes.
The dagger is also used to indicate death, extinction, or obsolescence. The asterisk and the dagger, when placed beside years, are used to indicate year of birth and year of death respectively. When placed immediately before or after a person's name, it indicates that the person is deceased. In this usage, it is referred to as the "death dagger". In the Oxford English Dictionary, the dagger symbol is used to indicate an obsolete word.
The dagger should not be confused with the Unicode characters "Latin cross" (✝, U+271D), "box drawings light vertical and horizontal" (┼, U+253C), and other cross symbols. The double dagger should not be confused with the palatal click ([ǂ], U+01C2), the Cross of Lorraine (☨, U+2628), or the patriarchal cross (☦, U+2626).
- In mathematics and, more often, physics, a dagger is used to denote the Hermitian adjoint of an operator; for example, A† denotes the adjoint of A. This notation is sometimes replaced with an asterisk, especially in mathematics. An operator is said to be Hermitian if A† = A.
- In textual criticism and in some editions of works written before the invention of printing, daggers are used to enclose text that is believed not to be original.
- In biology, the dagger next to a taxon name indicates that the taxon is extinct., or when a type material was destroyed.
- In cataloging, a double dagger is used to delimit MARC subfields.
- In chess notation, the dagger may be suffixed to a move to signify the move resulted in a check, and a double dagger is used to denote checkmate. This is a stylistic variation on the more common '+' (plus sign) for a check and '#' (octothorpe) for checkmate.
- In chemistry, the double dagger is used in chemical kinetics to indicate a transition state species.
- In psychological statistics the dagger is used to indicate that a difference between two figures is not significant to a p<0.05 level, however is still considered a "trend" or worthy of note. Commonly this will be used for a p-value between 0.1 and 0.05.
- On a cricket scorecard or team list, the dagger indicates the team's wicket-keeper.
- In military history, a dagger is often placed next to the name of a commander who is killed in action.
- The asteroid 37 Fides, the last asteroid to be assigned an astronomical symbol before the practice faded, was assigned the dagger.
- In philology, the dagger indicates an obsolete form of a word or phrase.
- In the early printings of the King James Bible a dagger is used to indicate a literal translation of a word or phrase is to be found in the margin. When used the margin begins with an abbreviation (Heb. Gk. Chald. Lat.) for the original language.
- In the Geneva Bible a double dagger is used to indicate a literal translation of a word or phrase is to be found in the margin. When used the margin begins with an abbreviation (Heb. Gk. Chald. Lat.) for the original language.
While daggers are freely used in English-language texts, they are often avoided in other languages because of their similarity to the Christian cross. In German, for example, daggers are commonly employed only to indicate a person's death or the extinction of a word, language, species or the like.
- U+2020 † DAGGER (HTML
- U+2021 ‡ double DAGGER (HTML
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2E59 TRIPLE DAGGER
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Though Everson managed to get two characters of medieval punctuation accepted at the last UTC meeting, he was dismayed that those accepted, including “the triple dagger” (which looks like three small swords stacked on top of one another), weren’t “particularly important to medievalists or really medieval at all.” Meanwhile, the consortium has accepted 79 new emoji proposals as candidates for its next emoji release
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