Sentence:  Then as it [a giant serpent] opened its <WSD>gorge</WSD> with a gasp, / Darra his son made a running bound, / And keeping his sharp skian firm in his grasp, / Dived headlong into its throat profound. 
Meaning of the word marked with <WSD> tags:  The inside of the throat; the esophagus, the gullet;  the crop or gizzard of a hawk.