tachy-

American  

1. a combining form meaning “swift,” used in the formation of compound words.

   tachygraphy.

---

tachy- British  

combining form

1. swift or accelerated

   tachycardia

   tachygraphy

   tachylyte

   tachyon

   tachyphylaxis

---

Usage

What does tachy- mean? Tachy- is a combining form used like a prefix meaning “swift.” It is often used in scientific and medical terms.Tachy- comes from the Greek tachýs, meaning “swift.”What are variants of tachy-?A variant of tachy- is tacheo-, as in tacheometer. Closely related to tachy- is the combining form tacho-, which you can learn more about in our Words That Use tacho- article.

Etymology

Origin of tachy-

< Greek, combining form of tachýs

Example Sentences

So I did the Rattle: “IL-2 patient, hypotensive, B.P. hovering between 70 over 40 to 60 over 30, occasionally tachy, bolused once this morning for a pressure of 80 over 50, getting another bolus right now, already fluid overloaded, crackles at the bases.”

From New York Times

Chronic Cases.—There is usually a gradual onset of tachy cardia,—fast beating of the heart,—pulse being 100 to 180 or more, if excited.

From Project Gutenberg