PROPULSION SYSTEM
\pɹəpˈʌlʃən sˈɪstəm], \pɹəpˈʌlʃən sˈɪstəm], \p_ɹ_ə_p_ˈʌ_l_ʃ_ə_n s_ˈɪ_s_t_ə_m]\
Word of the day
dromaeognathae
- Prof. Huxley's classification a sub-order Carinatae (birds having sternum with keel), including but one family, Tinamidae tinamous. In this suborder the bones of upper jaw or skull are like what they struthious swift-footed birds, as ostrich.