acoustic: a remedy for hearing loss or deafness
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
superclass myriapoda: used in some classifications to encompass the millipedes (Diplopoda) and centipedes (Chilopoda); formerly a large taxon including also the Pauropoda and Symphyla; the term Myriapoda now usually used synonymously with Diplopoda and limited to the millipedes