For the writer (seller) of a call option, it represents an obligation to sell the underlying security at the strike price if the option is exercised. The call option writer is paid a premium for taking on the risk associated with the obligation.
Definition of gonad. : a reproductive gland (as an ovary or testis) that produces gametes.
The gonads in males are the testes and the gonads in females are the ovaries. Compare the roles played in the endocrine system by the male and female gonads. The ovary is an ovum-producing reproductive organ, often found in pairs as part of the vertebrate female reproductive system.