snail

at a snail's pace

very slowly. The roads were full of traffic and we were travelling at a snail's pace.

See also: pace

snail mail (humorous)

the system of sending letters through the post. What's your preferred means of communication? Fax, email or snail mail?

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at a snail's pace

very slowly. The action moves at a snail's pace in this film, as if all the characters were asleep.

Etymology: from the fact that a snail (= a small animal with a round shell) moves very slowly

See also: pace