from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One who believes that all space is full of matter.
from the GNU version of the Collaborative International Dictionary of English
- n. One who holds that all space is full of matter.
from The Century Dictionary and Cyclopedia
- n. One who maintains that all space is full of matter; one who denies the possibility of a vacuum or the reality of empty space.
Latin plenus full; compare French pléniste. (Wiktionary)