Digitoxin

Part of speech: noun

Definitions

1. A cardiac glycoside derived from the plant Digitalis, used to treat heart conditions by increasing the force of heart contractions
2. A potent substance extracted from foxglove, utilized in medicine to manage heart failure and certain arrhythmias
3. An organic compound aiding in the treatment of heart disorders by influencing heart muscle contractions and rhythm

Etymology: Digitoxin is a blend of two words: "digitalis," the name of the foxglove plant genus (itself from Latin "digitalis," meaning "of the finger," a reference to the finger-shaped flowers), and "toxin," the word for a poison produced by a living organism. The first half points to the plant, and the second points to what the compound does in high doses. The blend records a plain fact about the substance: it is a poison whose source is the foxglove. In small, carefully measured amounts, that same toxicity is what makes it useful, since it strengthens the heart's contractions and slows its rhythm, which helps in treating heart failure and certain irregular heartbeats. The name keeps both sides of that story in one word, a medicine and a poison from the same plant.