One of the mysteries of the English language finally explained.
1A (hypothetical or real) drug that increases or preserves cognitive ability or memory.
2A tiny capsule-like device incorporating a miniaturized camera, sensor, pump, or other mechanism, often with a microchip, which can be inserted into the body for diagnostic or therapeutic purposes.
1950s; earliest use found in The San Mateo Times. From smart + pill.
smart pill/ˈsmɑːt ˌpɪl/
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