( ( ( Leukocytes White ) ( ( ( blood cells ) or ) corpuscles ) ) . )
(ROOT (NP (NP (NNP Leukocytes) (NNP White)) (NP (NP (NN blood) (NNS cells)) (CC or) (NP (NNS corpuscles))) (. .)))
Leukocytes White blood cells or corpuscles.
(ROOT (S (NP (JJ Leukocytes) (NN blood) (NNS cells)) (VP (VBP are) (ADJP (JJ white))) (. .)))