Sentence:  The moment of <WSD>ejaculation</WSD> in mammiferous animals is accompanied by universal excitement of the whole body, a kind of slight convulsion, which terminates in a comatose or exstatic state. 
Meaning of the word marked with <WSD> tags:  A reflex in human beings and other mammals in response to sexual stimulation involving the forcible ejection from the urethra of, in males, semen; and, in females, vaginal fluid.