crowfoot cell

An early battery consisting of a copper pot filled with a copper sulphate solution, in which was immersed an unglazed earthenware container filled with sulphuric acid and a zinc electrode.

A later variant of the Daniell cell, using a layer of zinc sulphate on top of the copper sulphate, the two liquids kept separate by their differing densities.

A device that is used to subject small samples of materials to exceptionally high pressures

A small coin cell

A small battery having the form of a squat cylinder.

A large pyramidal cell neuron located within the fifth layer of the grey matter in the primary motor cortex.

(geometry) A four-dimensional polytope whose twenty-four bounding facets are octahedra and which has no three-dimensional analogue.

(geometry) A four-dimensional polytope, analogous to an octahedron, whose sixteen bounding facets are tetrahedra.

(geometry) A four-dimensional polytope, analogous to a dodecahedron, whose 120 bounding facets are dodecahedra.