How many letters does the top answer for “having a smooth, compact shell without pores; -- said of certain foraminifera.” have?

The most common answer is porcelaneous (12 letters).

Crossword clue: having a smooth, compact shell without pores; -- said of certain foraminifera.

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

porcelaneous 12 letters web-def

Having a smooth, compact shell without pores; -- said of certain Foraminifera.

porcellaneous 13 letters web-def

Having a smooth, compact shell without pores; -- said of certain Foraminifera.