What does 'every other day' mean?

English Grammar Tests, Elementary Level

ESL/EFL Test #229 [color=blue]“Adverbs of Quantity (2)”, question 6

I water the plants other day. I think I’m watering them too much.

(a) much
(b) all
(c) every
(d) lots of

English Grammar Tests, Elementary Level

ESL/EFL Test #229 [color=blue]“Adverbs of Quantity (2)”, answer 6

I water the plants every other day. I think I’m watering them too much.

Correct answer: (c) every

Your answer was: [color=green]correct
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every other day= every second day?
thanks!

Yes.[YSaerTTEW443543]

TOEIC listening, photographs: An exotic performer[YSaerTTEW443543]