( ( radioisotope ( An ( ( ( ( ( isotope ( that ( is radioactive ) ) ) , ) i.e. ) , ) ( one ( ( having ( ( ( an ( unstable nucleus ) ) , ) ( which ( ( gives it ) ( ( the property ) ( of decay ) ) ) ) ) ) ( by ( ( ( one or ) more ) ( of ( several processes ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB radioisotope) (NP (DT An) (S (S (VP (VB isotope) (SBAR (IN that) (S (VP (VBZ is) (ADJP (JJ radioactive))))))) (, ,) (FW i.e.) (, ,) (S (NP (NP (CD one)) (VP (VBG having) (NP (NP (DT an) (JJ unstable) (NN nucleus)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ gives) (NP (PRP it)) (NP (NP (DT the) (NN property)) (PP (IN of) (NP (NN decay)))))))) (PP (IN by) (NP (NP (QP (CD one) (CC or) (JJR more))) (PP (IN of) (NP (JJ several) (NNS processes))))))))))) (. .)))
radioisotope An isotope that is radioactive, i.e., one having an unstable nucleus, which gives it the property of decay by one or more of several processes.
(ROOT (S (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NNS radioisotopes)) (VP (VBZ is) (NP (NP (DT an) (NN isotope)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (JJ radioactive))))))) (. .)))