Definition of saponaceous
: resembling or having the qualities of soap
Did You Know?
Saponaceous is a New Latin borrowing by scientists that is based on sapo, the Latin word for "soap." It describes natural substances, like aloe gel or some plant roots, used in making soap or having the properties of soap. It also describes things that feel or appear soapy-for example, some shales and clays, mica, and certain chemical preparations. In the 19th century, saponaceous began to be used for people having a slippery, evasive, or elusive character. One famous example is the elocutionist Bishop Wilberforce mentioned in our second example sentence, whom British politician Benjamin Disraeli described as "unctuous, oleaginous, saponaceous." In The Devil's Dictionary, author Ambrose Bierce uses Disraeli's quote to illustrate the word oleaginous, noting that "the good prelate was ever afterward known as Soapy Sam."
Origin and Etymology of saponaceous
New Latin saponaceus, from Latin sapon-, sapo soap, of Germanic origin; akin to Old English sāpe soap
First Known Use: 1710
Medical Definition of saponaceous
: resembling or having the qualities of soap <a saponaceous preparation>
Seen and Heard
What made you want to look up saponaceous? Please tell us where you read or heard it (including the quote, if possible).