English
protolith
From proto- + -lith.
Proto-Germanic *liþuz ‘limb’
Proto-West Germanic *liþu
Old English liþ ‘limb, member, joint, tip of finger, point’
Middle English lith
English lith
Today it means
noun The original precursor of any specified metamorphic rock
Sources
Sources: Wiktionary, “protolith”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / protolith