R1, R.I., R01 or R-1 may refer to:
==Biology== R1 plasmid, a plasmid found in E Coli ATC code R01 Nasal preparations, a subgroup of the Anatomical Therapeutic Chemical Classification System Haplogroup R1 (Y-DNA), a human Y-chromosome DNA haplogroup The R1 vein in insect wings
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).