plural of pebble plant

A form of nuclear reactor using spherical fuel elements which are individually processed and fed through the reactor.

plural of pebble-bed reactor

plural of pebblestone

(countable) A pebble. / (uncountable) Pebbles collectively.

Any of various freshwater snails in the families Hydrobiidae and Lithoglyphidae in superfamily Rissooidea.

plural of pebblesnail