concave on both sides

concave on both sides

concave on both sides

concave on both sides

concave on both sides

the boundary in ancient times between Italy and Gaul; Caesar's crossing it with his army in 49 BC was an act of war

an iconic mental representation

an iconic mental representation

any of a large class of siloxanes that are unusually stable over a wide range of temperatures; used in lubricants and adhesives and coatings and synthetic rubber and electrical insulation

The sum of words used by, understood by, or at the command of a particular person or group, A supply of expressive means; a repertoire of communication, A list or collection of words arranged in alphabetical order and explained; a dictionary or lexicon, either of a whole language, a single work or author, a branch of science, or the like; a word-book