mean solar day

1. The mean transmissivity of greenhouse for solar radiation inside is about 60% during sunny days. The ovipositing number per day was lowest at 19 ℃.
   晴天日均透光率为60%左右。日均产卵量在19℃下最小。

noun

1. time for Earth to make a complete rotation on its axis
   1. two days later they left
   2. they put on two performances every day
   3. there are 30,000 passengers per day

   Synonym:    daytwenty-four hourstwenty-four hour period24-hour intervalsolar day