plural of pseudoseptum

a type of paper manufactured from calcium carbonate mixed with a high density polyethylene bonding agent

(predominantly Australia) A woodlouse, any of various terrestrial crustaceans of the suborder Oniscidea. / A man or boy who works for a butcher shop; a butcher's boy.

(logic) A set of axioms of first-order logic for the natural numbers specifying the operations of zero, successor, addition and multiplication, including a first-order schema of induction.