Meaning
An mks unit of luminous energy, exactly corresponding to the SI lumen second.
Etymology
Origin: Unknown
After Henry Fox Talbot, a 19th-century pioneer of photography.
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, 2024, 2025.