( ( ( A ( network ( ( ( solid or ) covalent ) network ) ) ) solid ) ( ( ( ( is ( a ( chemical compound ) ) ) ( -LRB- ( ( or element ) -RRB- ) ) ) ( ( in which ) ( ( the atoms ) ( are ( ( bonded ( by ( covalent bonds ) ) ) ( in ( ( a ( continuous network ) ) ( extending ( throughout ( the material ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN network) (ADJP (JJ solid) (CC or) (JJ covalent)) (NN network)) (ADJP (JJ solid))) (VP (VBZ is) (NP (DT a) (JJ chemical) (NN compound)) (PRN (-LRB- -LRB-) (CC or) (VB element) (-RRB- -RRB-)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (DT the) (NNS atoms)) (VP (VBP are) (VP (VBG bonded) (PP (IN by) (NP (JJ covalent) (NNS bonds))) (PP (IN in) (NP (NP (DT a) (JJ continuous) (NN network)) (VP (VBG extending) (PP (IN throughout) (NP (DT the) (NN material))))))))))) (. .)))
A network solid or covalent network solid is a chemical compound (or element) in which the atoms are bonded by covalent bonds in a continuous network extending throughout the material.
(ROOT (S (NP (DT A) (NN covalent) (NN network)) (ADVP (RB solid)) (VP (VBZ is) (NP (NP (DT a) (NN compound)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NP (DT all)) (PP (IN of) (NP (DT the) (NNS atoms)))) (VP (VBP are) (VP (VBN connected) (PP (TO to) (NP (CD one) (DT another))) (PP (IN by) (NP (JJ covalent) (NNS bonds))))))))) (. .)))