A container containing an electrolyte and two electrodes; used to produce direct current electricity; one or more of them constitute a battery.

(cytology) A cell that is part of the germ line: a gametocyte, an ovum or a sperm cell.

(cytology) A cell in the brain, such as a neuron or a glial cell. / (colloquial) neuron / (humorous) -- taken as a unit of intelligence

(cytology) A cell of the nervous system which conducts nerve impulses; a neuron.

(hematology, cytology) Any of the cells normally found in blood, namely erythrocytes and leukocytes, sometimes including the platelets.

A group of people (sleepers) who inconspicuously remain dormant in a community until activated, by a prearranged signal, to perform acts of espionage, sabotage, and/or terrorism.

(cytology) The semipermeable membrane that surrounds the cytoplasm of a cell.

(energy) An electrochemical device in which the intrinsic chemical free energy of fuel and oxidant is catalytically converted to direct current energy.

(cytology) Any normal cell of an organism that is not involved in reproduction; a cell that is not on the germline.

(cytology) A thick, fairly rigid, layer formed around individual cells of bacteria, Archaea, fungi, plants, and algae (but not animals and other protists which generally have cell membranes without cell walls). The cell wall is external to the cell membrane and serves a structural function helping the cell maintain its shape and protecting the cell from damage.