EJACULATION By Nugent, Pam M.S. - April 7, 2013 Tje automatic expulsion of semen from the penis. See orgasm- premature ejaculation- retrograde ejaculation. EJACULATION: "Ejaculation involves voluntary and involuntary contractions of muscles." Related Psychology Terms SQUEEZE TECHNIQUE URETHRA SEMINAL DISCHARGE SPERMATORRHEA RETROGRADE EJACULATION ORGASTIC IMPOTENCE PREORGASMIC MALE SEXUAL DISORDER BLOW JOB VULVAL ORGASM Cite this page: Nugent, Pam M.S., "EJACULATION," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/ejaculation/ (accessed June 27, 2017).