Meaning
An isomer of a benzene derivative having two substituents adjacent on the ring.
Etymology
Origin: Unknown
Ultimately from the prefix ortho-.
NYT Puzzle Appearances
No published puzzle dates on file for this word yet. It is part of the official NYT Spelling Bee word list for 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026.