U+FE74 ARABIC KASRATAN ISOLATED FORM

U+FE74 was added to Unicode in version 1.1 (1993). It belongs to the block Arabic Presentation Forms-B in the Basic Multilingual Plane.

This character is a Other Letter and is mainly used in the Arabic script.

The glyph is a Isolated composition of the glyphs . It has a Neutral East Asian Width. In bidirectional context it acts as Arabic Letter and is not mirrored. The glyph can, under circumstances, be confused with 1 other glyphs. In text U+FE74 behaves as Alphabetic regarding line breaks. It has type OLetter for sentence and ALetter for word breaks. The Grapheme Cluster Break is Any.

The Wikipedia has the following information about this codepoint:

In some Semitic languages, such as Arabic, nunation (Arabic: تنوين‎ tanwīn) is the addition of a final nūn sound to a noun or adjective to indicate that it is fully declinable and syntactically unmarked for definiteness.

There are three of these vowel diacritics, and the signs indicate, from left to right, the endings -un (nominative case), -in (genitive), and -an (accusative). The sign ـً‎ is most commonly written in combination with ا‎ alif (ـًا‎), ةً‎ (tāʾ marbūṭa تاء مربوطة) or stand-alone ءً‎ (hamza همزة). An alif should always be written unless the word ends in tāʾ marbūṭa or hamza or is a diptote, even though the -un, -an or -in is not written.

Since Arabic has no indefinite article, nouns in a syntactic context unmarked for definiteness are generally indefinite; this has led to the extremely common but inaccurate belief that nunation is a marker for indefiniteness and is analogous to an indefinite article. The lack of a marker for definiteness does not necessarily make a word indefinite; in fact, many definite nouns (proper names) take nunation, as for example in the expression أشهد أن محمدًا رسول الله (ašhadu anna muḥammadan rasūlu allāh: "I witness that Muhammad is the messenger of God."), in which the name Muḥammad, a definite noun, is nunated.

Nunation may also refer to the -n  ending of duals in Akkadian (until it was dropped in the Old Babylonian period).