Meaning
Glacial till cemented into a solid rock.
Etymology
Origin: German
From till + -ite, after German Tillit.
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.