How many letters does the top answer for “in the form on manner of a prism; by means of a prism.” have?

The most common answer is prismatically (13 letters).

Crossword clue: in the form on manner of a prism; by means of a prism.

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

prismatically 13 letters web-def

In the form on manner of a prism; by means of a prism.

in a square form or manner. 50% similar → squarely

in the form or manner of a specter. 50% similar → spectrally

in the form or manner of an amphitheater. 50% similar → amphitheatrically