dot
noun [ C ]
uk/dɒt/ us INTERNET
a very small round mark that is used in an internet address or email address to separate its parts:
Dot gov sites are reserved for governmental offices.
on the dot
exactly at the stated or expected time
connect/join the dots
to understand the relationship between different ideas, facts, or experiences:
My experiment has revealed how we fail to connect the dots between the way we live today and the needs of tomorrow.