point of reference

Từ điển WordNet v3.1 - WordNet Dictionary

noun

an indicator that orients you generally
- it is used as a reference for comparing the heating and the electrical energy involved
• Syn:
reference point, reference
• Hypernyms:
indicator
• Hyponyms:
benchmark, bench mark, landmark, lubber's line, lubber line,
lubber's mark, lubber's point, target, mark, white line, buoy