| 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)
n.
The secretion or formation of milk by the mammary glands.
The period during which the mammary glands secrete milk.
| lactation (lāk-tā'shən) Pronunciation Key
The secretion or production of milk by the mammary glands in female mammals after giving birth. |