( ( Decibel ( -LRB- ( ( dB -RRB- ) ( ( A unit ) ( for ( measuring ( ( the ( relative ( volume ( ( level or ) intensity ) ) ) ) ( of sound ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Decibel) (S (-LRB- -LRB-) (NP (NN dB)) (-RRB- -RRB-) (NP (NP (DT A) (NN unit)) (PP (IN for) (S (VP (VBG measuring) (NP (NP (DT the) (JJ relative) (NN volume) (NN level) (CC or) (NN intensity)) (PP (IN of) (NP (NN sound)))))))))) (. .)))
Decibel (dB) A unit for measuring the relative volume level or intensity of sound.
(ROOT (S (NP (NNP Decibel)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (VP (VBN used) (S (VP (TO to) (VP (VB measure) (NP (NP (DT the) (NN intensity)) (PP (IN of) (NP (JJ sound) (NNS waves)))))))))) (. .)))