(historical, archaic) The former term referring to Iran in the West. / Persia proper (Persis), the land of the ancient Persians, corresponding to modern-day Fars province in southwestern Iran.

The ancestor of New Persian spoken from around 300 BC till about 800 AD, evolving from Old Persian.

An insecticidal powder usually made from Tanacetum cinerariifolium or Tanacetum coccineum, natural sources of pyrethrins.

Tajiki (variety of the Persian language)

A dialect (or group of dialects) of the Persian language spoken in the Eastern extremities of the language's range, especially in Afghanistan.

The quality of being Persian.

The ancestor language of Middle Persian, and via it of New Persian language. Attested in Old Persian cuneiform, in the period 525 B.C.E. - 300 B.C.E..

Of or pertaining to Persius (Roman writer)

(historical) The empire ruled by the Achaemenid dynasty 550–330 B.C.E.. / (historical) The empire ruled by the Sassanid dynasty 224–651 C.E..

(uncountable) The Persian language, or a family of languages spoken primarily in Iran, Afghanistan, Tajikistan, and Uzbekistan. / (countable) A person from Persia.