( ( ( endotherm ( -LRB- ( ( or homeotherm ) -RRB- ) ) ) ( ( An organism ) ( that ( can ( regulate ( its ( internal temperature ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NP (NN endotherm)) (PRN (-LRB- -LRB-) (NP (QP (CC or) (CD homeotherm))) (-RRB- -RRB-))) (NP (NP (DT An) (NN organism)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (VP (VB regulate) (NP (PRP$ its) (JJ internal) (NN temperature))))))) (. .)))
endotherm (or homeotherm)An organism that can regulate its internal temperature.
(ROOT (S (NP (NNS Endotherms)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (NNS organisms)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (VP (VB maintain) (NP (DT a) (JJ stable) (NN body) (NN temperature)) (ADVP (RB even)) (PP (IN in) (NP (NP (DT the) (NN face)) (PP (IN of) (NP (NP (JJ large) (NNS fluctuations)) (PP (IN in) (NP (DT the) (JJ environmental) (NN temperature))))))))))))))) (. .)))