sub ‧ mer ‧ si ‧ ble /səbˈmɜːsəb ə l, səbˈmɜːsɪb ə l $ -ˈmɜːr-/ BrE AmE noun [countable]
a small vehicle that can travel under water, especially one that travels to very great depths in the ocean for scientific purposes
—submersible adjective
sub ‧ mer ‧ si ‧ ble /səbˈmɜːsəb ə l, səbˈmɜːsɪb ə l $ -ˈmɜːr-/ BrE AmE noun [countable]
a small vehicle that can travel under water, especially one that travels to very great depths in the ocean for scientific purposes
—submersible adjective
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012