How many letters does the top answer for “relating to or containing or resembling silica” have?

The most common answer is siliceous (9 letters).

Crossword clue: relating to or containing or resembling silica

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

siliceous 9 letters wn-def

relating to or containing or resembling silica

silicious 9 letters wn-def

relating to or containing or resembling silica

relating to or containing or resembling albumin 60% similar → albuminous