Obelus
noun ·Rare ·Advanced level
Definitions
- 1 A symbol resembling a horizontal line (–), sometimes together with one or two dots (for example, ⨪ or ÷), which was used in ancient manuscripts and texts to mark a word or passage as doubtful or spurious, or redundant; an obelisk. historical
"The ancienteſt of all is that of the Library of M. Colbert, which contains part of Exodus, Numbers, and Leviticus, of the Tranſlation of the Septuagint, with Lines call'd Obeli and Aſteriſks, as we find them in the Hexapla of Origen."
- 2 A dagger symbol (†), which is used in printed matter as a reference mark to refer the reader to a footnote, marginal note, etc.; beside a person's name to indicate that the person is deceased; or beside a date to indicate that it is a person's death date; an obelisk.
"And, with respect to the Homer of Aristarchus, it is to be considered, that besides the lines, sentences, and long passages, to which that Herod of critics affixed his obelus (†) or stiletto, there were entire books which he found no use on obelising piecemeal; because it was not this line or that line into which he wished to thrust his dagger, but the whole rabble of lines—"tag, rag, and bobtail.""
Synonyms
All synonymsExample
More examples"The ancienteſt of all is that of the Library of M. Colbert, which contains part of Exodus, Numbers, and Leviticus, of the Tranſlation of the Septuagint, with Lines call'd Obeli and Aſteriſks, as we find them in the Hexapla of Origen."
Etymology
From Middle English obelus, obelo, from Old English obelus, from Late Latin obelus (“critical mark”), from Koine Greek ὀβελός (obelós, “critical mark”), Ancient Greek ὀβελός (obelós, “rod, spit; obelisk; critical mark”). The further etymology is uncertain; a derivation from βέλος (bélos, “arrow, dart, missile”) (from Proto-Indo-European *gʷelH- (“to pierce; to reach; to throw; to hit by throwing”)) has been suggested, but the initial vowel remains unexplained. Compare obelisk. The plural form obeli is derived from Late Latin obeli, from Ancient Greek ὀβελοί (obeloí).
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.