Meaning of crypto-dynamic in English:

crypto-dynamic

Pronunciation /ˌkrɪptəʊdʌɪˈnamɪk/

adjective

historical, rare Mechanics
  • Designating an enclosed two-speed epicyclic gear originally designed for use on bicycles. Compare "crypto".

    The gear was invented by W. T. Shaw of the Crypto Cycle Company, London.

Origin

Early 19th century (in an earlier sense). From crypto- + dynamic.