A substance, such as pepper or snuff, that causes sneezing.

Relating to a substance that causes sneezing.

Any plant of the division Pteridophyta, of simple vascular plants that reproduce via spores rather than seeds and that alternate generations of diploid (sporophyte) and haploid (gametophyte or prothallus) forms, the diploid generally being larger and more conspicuous.

(historical) Of or pertaining to the Ptolemy dynasty of pharaohs, the Ptolemies, rulers of Hellenistic Egypt. / (astronomy) Of or pertaining to the astronomer Claudius Ptolemy.

Claudius Ptolemaeus (c. 90 – c. 168 AD), a Greek-speaking mathematician, geographer, astronomer, and astrologer who lived in the Hellenistic culture of Alexandria in Roman Egypt. His most important works were the Almagest and the Geography

(organic chemistry) A carcinogenic terpenoid glycoside, found in bracken, that is poisonous to cattle.

plural of ptarmic

Initialism of powers that be. / (medicine) Initialism of preterm birth.

Abbreviation of private (soldier).

plural of ptarmigan