What is the meaning of хъ?

The fifty-first letter of the Abaza alphabet, written in the Cyrillic script.

The forty-fourth letter of the Adyghe alphabet, written in the Cyrillic script.

The thirty-seventh letter of the Aghul alphabet, written in the Cyrillic script.

The seventy-ninth letter of the Archi alphabet, written in the Cyrillic script.

The thirty-second letter of the Dargwa alphabet, written in the Cyrillic script.

The forty-fifth letter of the Kabardian alphabet, written in the Cyrillic script.

The thirty-second letter of the Lezgi alphabet, written in the Cyrillic script.

The thirty-third letter of the Tabasaran alphabet, written in the Cyrillic script.

The thirty-second letter of the Avar alphabet, written in the Cyrillic script.

The thirty-first letter of the Ossetian alphabet, written in the Cyrillic script.

Source: wiktionary.org