From WordNet (r) 3.0 (2006):
tot
n 1: a small amount (especially of a drink); "a tot of rum"
2: a young child [syn: toddler, yearling, tot, bambino]
v 1: determine the sum of; "Add all the people in this town to
those of the neighboring town" [syn: total, tot, tot
up, sum, sum up, summate, tote up, add, add
together, tally, add up]