Princeton's WordNet(1.00 / 2 votes)Rate this definition: Wiktionary(2.67 / 3 votes)Rate this definition: infinity(Noun) Limitlessness, unlimitedness, something which is growing without limits or bounds. infinity(Noun) A number that has an infinite numerical value that cannot be counted.
univalve (mollusk) a class of mollusks typically having a 1-piece coiled shell and flattened muscular foot with a head bearing stalked eyes. animal noun (animals and microorganisms) univalves.
Valve refers to a shell, so a bivalve possesses two shells, which are usually hinged together and more or less cover the animal (Class Bivalvia), while univalves have only one shell, and typically leave the muscular foot exposed, unless the animal is capable of withdrawing into its shell (Class Gastropoda).our interface to the operating system is called a shell.   The shell is the outermost layer of the operating system. Shells incorporate a programming language to control p â¦ rocesses and files, as well as to start and control other programs.