n. 1 parasitic arachnid on the skin of dogs, cattle, etc. 2 parasitic insect on sheep and birds etc. [Old English] tick3 n. colloq. credit (buy goods on tick). [apparently an abbreviation of TICKET in on the ticket]
n. 1 parasitic arachnid on the skin of dogs, cattle, etc. 2 parasitic insect on sheep and birds etc. [Old English] tick3 n. colloq. credit (buy goods on tick). [apparently an abbreviation of TICKET in on the ticket]