spongiform, spongioid 1. Resembling a sponge in appearance or texture; spongy. 2. Resembling a sponge; soft and porous; porous. 3. Resembling a sponge in being soft and full of cavities; such as, in transmissible spongiform encephalopathy. Found on http://www.wordinfo.info/words/index/info/view_unit/2018/