Collins Chinese Dictionary Plus (3rd edition), 2011:
midday [mɪdˈdeɪ]
I n
[u]
1
(=noon) 正午 zhèngwǔ
2
(=middle of the day) 中午 zhōngwǔ
II adj
中午的 zhōngwǔ de
- at midday
(=at noon) 在正午 zài zhèngwǔ (=in the middle of the day) 在中午 zài zhōngwǔ
在这些条目还发现'midday'：
在英文解释里：
afternoon
- at noon
- before noon
- dinner
- dinner lady
- early afternoon
- eat lunch
- have lunch
- high noon
- in the afternoon
- lunch break
- lunch hour
- lunch time
- meridian
- morning routine
- noon
- nooner
- packed lunch
- skip lunch
- this afternoon
- tomorrow afternoon
- twelve o'clock
- yesterday afternoon
中文：