|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
lactation lac·ta·tion (lāk-tā'shən)
The secretion or formation of milk by the mammary glands.
The period during which the mammary glands secrete milk.