dry cell: a small Leclanche cell containing no free liquid; the electrolyte is a paste and the negative zinc pole forms the container of the cell; used in flashlights, portable radios, etc.
voltaic cell: an electric cell that generates an electromotive force by an irreversible conversion of chemical to electrical energy; cannot be recharged
begoniaceae: monoecious succulent herbs or shrubs of tropical and warm regions especially America