The proboscisless leeches, Arhynchobdellida, are classified as an order of the Hirudinea. But leech taxonomy and systematics will eventually be revised in due time, not because there are many uncertainties about their phylogeny, but because the major clades of clitellate annelids - and whether the clitellates are themselves a clade - have not been fully elucidated.
Theravada Buddhism defines arhat (Sanskrit) or arahant (Pali) as "one who is worthy" or as a "perfected person" having attained nirvana.
Rho GTPase-activating protein 8 is an protein that in humans is encoded by the ARHGAP8 gene.
Arhuaco, commonly known as Ikʉ, is an Indigenous American language of the Chibchan language family, spoken in South America by the Arhuaco people.
Rho guanine nucleotide exchange factor 12 is a protein that in humans is encoded by the ARHGEF12 gene.
Arhaan Behll (born 6 August 1984) is an Indian actor. With more than 30 nominations and 18 awards, including ITA Best Actor award, Arhaan Behll is considered as one of the finest actors of the industry.
Arhavi (Laz: არქაბი/Arkabi; Georgian: არქაბი/arkabi), is a town and district of Artvin Province located in the Black Sea region of Turkey.
Rho GDP-dissociation inhibitor 2 is a protein that in humans is encoded by the ARHGDIB gene. Aliases of this gene include RhoGDI2, GDID4, Rho GDI 2, and others.
Arhansus (Basque: Arhantsusi) is a French commune in the Pyrénées-Atlantiques department in the Nouvelle-Aquitaine region of south-western France.
Arhopala aronya natsumiae  is a butterfly of the Lycaenidae family. The species is endemic to the Philippines.