( ( The fontanelles ) ( ( ( ( are ( ( the crevices ) ( in ( ( a ( newborn 's ) ) skull ) ) ) ) , ) ( literally ( where ( ( the skull ) ( ( ( has not ) completely ) ( ( ( grown over ) and ) sealed ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS fontanelles)) (VP (VBP are) (NP (NP (DT the) (NNS crevices)) (PP (IN in) (NP (NP (DT a) (NN newborn) (POS 's)) (NN skull)))) (, ,) (SBAR (ADVP (RB literally)) (WHADVP (WRB where)) (S (NP (DT the) (NN skull)) (VP (VBZ has) (RB not) (ADVP (RB completely)) (VP (VP (VBN grown) (PRT (RP over))) (CC and) (VP (VBN sealed))))))) (. .)))
The fontanelles are the crevices in a newborn's skull, literally where the skull has not completely grown over and sealed.
(ROOT (S (NP (NP (DT The) (NNS bones)) (PP (IN of) (NP (DT the) (JJ newborn) (NN skull)))) (VP (VP (VBP are) (RB not) (ADJP (RB fully) (JJ ossified))) (CC and) (VP (VBP are) (VP (VBN separated) (PP (IN by) (NP (NP (JJ large) (NNS areas)) (VP (VBN called) (NP (NNS fontanelles)))))))) (. .)))