smectite

From Ancient Greek σμήχω (smḗkhō, “to rub off”) +‎ -ite.

smectite (countable and uncountable, plural smectites)

1. (mineralogy) Any of many clay phyllosilicate minerals that have a relatively open structure.

• David Barthelmy (1997–2025), “Smectite”, in Webmineral Mineralogy Database.
• “smectite”, in Mindat.org‎^[1], Hudson Institute of Mineralogy, 2000–2025.

smectite f (plural smectites)

1. (mineralogy) smectite

• “smectite”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

smectite f (plural smectiti)

1. (mineralogy) smectite