( ( ( Millibar - ) ( ( A ( metric unit ) ) ( of ( air ( pressure measurement ) ) ) ) ) . )
(ROOT (NP (NP (NNP Millibar)) (: -) (NP (NP (DT A) (JJ metric) (NN unit)) (PP (IN of) (NP (NN air) (NN pressure) (NN measurement)))) (. .)))
Millibar- A metric unit of air pressure measurement.
(ROOT (S (NP (NNP Millibar)) (VP (VBZ is) (NP (NP (DT the) (NN unit)) (VP (VBN used) (S (VP (TO to) (VP (VB measure) (NP (NN air) (NN pressure)))))))) (. .)))