ACL may refer to:

The law of obligations is one branch of private law under the civil law legal system and so-called "mixed" legal systems. It is the body of rules that organizes and regulates the rights and duties arising between individuals. The specific rights and duties are referred to as obligations, and this area of law deals with their creation, effects and extinction.

All or ALL may refer to:

In anatomy, a vinculum is a band of connective tissue, similar to a ligament, that connects a flexor tendon to a phalanx bone. They contain tiny vessels which supply blood to the tendon. In vertebrate anatomy, they are referred to as mesotendons.

A vinculum is a horizontal line used in mathematical notation for various purposes. It may be placed as an overline or underline above or below a mathematical expression to group the expression's elements. Historically, vincula were extensively used to group items together, especially in written mathematics, but in modern mathematics its use for this purpose has almost entirely been replaced by the use of parentheses. It was also used to mark Roman numerals whose values are multiplied by 1,000. Today, however, the common usage of a vinculum to indicate the repetend of a repeating decimal is a significant exception and reflects the original usage.

Lacuna may refer to:

"Infinite Regress" is the 101st episode of Star Trek: Voyager, the seventh episode of the fifth season. The show depicted a Starfleet spacecraft slowly making its way back to Earth after being stranded in the Delta Quadrant.

LCL can mean:

An overline, overscore, or overbar, is a typographical feature of a horizontal line drawn immediately above the text. In old mathematical notation, an overline was called a vinculum, a notation for grouping symbols which is expressed in modern notation by parentheses, though it persists for symbols under a radical sign. The original use in Ancient Greek was to indicate compositions of Greek letters as Greek numerals. In Latin, it indicates Roman numerals multiplied by a thousand and it forms medieval abbreviations (sigla). Marking one or more words with a continuous line above the characters is sometimes called overstriking, though overstriking generally refers to printing one character on top of an already-printed character.

Ligamen or vinculum is, in Roman Catholic canon law, an existing marriage tie, which constitutes an impediment to the contracting of a second marriage.

Leiocephalus vinculum, commonly known as the Gonave curlytail or Cochran's curlytail lizard , is a species of lizard in the family Leiocephalidae. It is native to Haiti.