castile soap

1. 1.

   a good hard soap made from olive oil and sodium hydroxide

   Broadersoap

Questions about castile soap

What does castile soap mean?

castile soap means "a good hard soap made from olive oil and sodium hydroxide".

Is castile soap a common word?

castile soap is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.