Tonuses

Part of speech: noun

Definitions

1. The states of normal continuous partial contraction or tension in muscles and nerves ; plural of a physiological term referring to consistent readiness in muscle fibers ; indicating multiple instances or variations of this sustained muscular or neural tension
2. Refers to multiple occurrences of the baseline level of muscular firmness and nerve excitability that maintains posture or readiness ; denotes more than one instance of steady contractile force in body tissues ; signifies various levels of persistent tension found in living fibers
3. Describes several instances of the continuous partial contraction inherent in muscle tissues and nerve activity ; the plural form representing various sustained states of muscle or nerve firmness ; encompassing multiple such conditions maintaining muscle tone or nerve readiness

Etymology: "Tonuses" is simply the plural of "tonus," a noun for the level of tension in a muscle, even when it is at rest. The singular was borrowed directly from Latin "tonus," meaning "strain" or "tension," which itself came from Greek "tonos," a word for stretching or tightening, as in a cord pulled taut. That makes "tonus" a sibling of words that look nothing alike on the surface. "Tone," "tune," and "ton" (in the sense of fashion or style) all descend from the same Latin source, so a musical note, a melody, and a fashionable manner share a root with the tightness of a stretched muscle. Each took a different path into English, with the musical senses and the fashion sense arriving at different times and by different routes.

Synonyms: tones, tensions, tightnesses, muscle tone

Antonyms: relaxations, flaccidity, loosening, slackness