Meaning
Describing rocks, such as silicate minerals, magmas, and volcanic and intrusive igneous rocks, which contain relatively high concentrations of magnesium and iron.
Etymology
Origin: Unknown
Blend of magnesium + ferric.
Synonyms & Antonyms
Synonyms
ferromagnesicbasic
Antonyms
felsicacidic
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 2021, 2026.