Meaning
Either of two cardiac glycoside poisons produced by the upas tree (Antiaris toxicaria).
Etymology
Origin: Unknown
From Antiaris + -in.
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, 2023, 2024, 2025, 2026.