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"
tall coarse perennial American herb having small white flowers followed by blackish-red berries on long drooping racemes; young fleshy stems are edible; berries and root are poisonous
make a hole by poking
stir by poking; "poke the embers in the fireplace"
(figurative) people whose criticisms are regarded as irrelevant or insignificant (resembling uneducated people who throw peanuts on the stage to express displeasure with a performance); "he ignored complaints from the peanut gallery"