positive pole: the terminal of a battery that is connected to the positive plate
terminal: a contact on an electrical device (such as a battery) at which electric current enters or leaves
commelinidae: one of four subclasses or superorders of Monocotyledones; comprises about 19,000 species in 25 families of mostly terrestrial herbs especially of moist places including: Cyperaceae; Gramineae; Bromeliaceae; and Zingiberaceae