SR GNT REV 6:15
 (P=100) πέτρας (petras) Typical English gloss=‘rocks’
 Strongs=40730 Lemma=petra
  Word role=noun Morphology=····AFP: case=accusative gender=feminine number=plural
  Year=96 AD
The various word forms of the root word (lemma) ‘petra’ have 3 different glosses: ‘a rock’, ‘rock’, ‘rocks’.