Meaning
Any of a class of cyclic amides that are the nitrogen analogs of lactones, formed by heating amino acids; the tautomeric enol forms are known as lactims.
Etymology
Origin: Latin
Etymology tree Latin lacder. English lacto- German Ketonbor. English ketone English -one English lac(tone) Egyptian jmnbor. Ancient Greek Ᾰ̓́μμων (Ắmmōn)bor. Latin Ammōn Latin ammoniacusder. English ammonia Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idusder. English -ide English am(ide) English lactam From lac(tone) + am(ide).
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, 2022, 2023, 2024, 2025, 2026.