a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee"
line consisting of a complex of fibers or filaments that are twisted together to form a thread or a rope or a cable
a pattern forming a unity within a larger structural whole; "he tried to pick up the strands of his former life"; "I could hear several melodic strands simultaneously"
a street in west central London famous for its theaters and hotels
a poetic term for a shore (as the area periodically covered and uncovered by the tides)
North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776