exists and is an alternate of . A lowercase 't' is the symbol for time. An uppercase 'T' signifies temperature, or perhaps something else depending on where it is used. Symbol for time could be a clock or : which is how time is written. Also hands on a clock can symbolize time. A lowercase 't' is the symbol for time. An uppercase 'T' signifies temperature, or perhaps something else depending on where it is used.Symbol for time could be a clock or : which is how time is written. Also hands on a clock can symbolize time.