monitor
US /ˈmɑː.nə.t̬ɚ/
UK /ˈmɑː.nə.t̬ɚ/

1.
2.
a large lizard, typically tropical, with a long tail, limbs, and neck, and a forked tongue
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We saw a huge monitor lizard basking in the sun.
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The zoo has several species of monitor lizards.
a large lizard, typically tropical, with a long tail, limbs, and neck, and a forked tongue