ovary: [17] Latin ōvum ‘egg’ came from the same Indo-European base (*ōwo-) as produced English egg. From it were derived the medieval Latin adjective ōvāl is ‘egg-shaped’ (source of English oval [16]) and the modern Latin noun ōvārium (whence English ovary). Also from ōvum come English ovate [18] and ovulate [19], and the Latin noun itself was adopted as a technical term in biology in the early 18th century. => egg[ovary etymology, ovary origin, 英语词源]
1650s, from Modern Latin ovarium "ovary" (16c.), from Medieval Latin ovaria "the ovary of a bird" (13c.), from Latin ovum "egg," from PIE *owyo-/*oyyo- "egg" (see egg (n.)). In classical Latin, ovarius meant "egg-keeper."