apostrophus

The omission of a vowel or syllable from a word, usually indicated by the apostrophe symbol ( ' ). examples: 'til, can't

Vowels suffer also this apostrophus before the consonant h.

Not that any examples are wanting to prove that the ancients did use the apostrophus in prose; for it was scarecely possible for them not to do so in many instances;

The apostrophe symbol used to mark this elision.

The apostrophus or mark of contraction, is the same with the comma, onely the difference is of place; for, this stands not in the line, but over the upper part thereof, where the contraction is:

In the Greek, as in other languages, a short vowel at the end of a word before another vowel, is thrown out by elision, and the apostrophus ' is placed as a mark or sign over the empty space;

An open notehead ( ~ ) or an apostrophe ( ' ) used as a neume to mark a low, unaccented syllable at the beginning of a phrase or a short quick syllable

You find not the apostrophus, and so miss the accent. Let me supervise the canzonet.

In the early Graduals Benevento VI. 38 and 40, the apostrophus is common in syllabic passages in sequences, tropes and prosulae.

The symbol 'Ↄ', used in Roman numerals to indicate multiplication by 10.

In every multiplication with ten a fresh apostrophus is added; thus IↃↃ = 5000, IↃↃↃ = 50,000.

The annexing of the apostrophus or inverted C (Ↄ) to IↃ makes its value ten times greater;