# Periodic vs Amplitude - What's the difference?

periodic | amplitude |

is relative to a period or periods or periodic can be of or derived from a periodic acid.

## As a noun amplitude is

the measure of something's size, especially in terms of width or breadth; largeness, magnitude.

# periodic

## English

### Alternative forms

* periodick (obsolete)

### Etymology 1

From (etyl) .

(-)
• Relative to a period or periods.
• Having repeated cycles.
• *{{quote-book, year=1899, author=(Stephen Crane)
• , title=, chapter=1 , passage=There was some laughter, and Roddle was left free to expand his ideas on the periodic visits of cowboys to the town. “Mason Rickets, he had ten big punkins a-sittin' in front of his store, an' them fellers from the Upside-down-F ranch shot 'em up […].”}}
• Occurring at regular intervals.
• Periodical.
• (label) Pertaining to the revolution of a celestial object in its orbit.
• For which any return to it must occur in multiples of $k$ time steps, for some $k>1$.
• (label) Having a structure characterized by periodic sentences.
• (label) Relating to, derived from, or designating, the highest oxygen acid (HIO) of iodine.
• ##### Antonyms
* (astronomy) non-periodic * (mathematics) aperiodic
##### Derived terms
(terms derived from periodic) * periodic classification * periodic function * periodic law * periodic system * periodic table

### Etymology 2

(-)
• Of or derived from a periodic acid.
• ##### Derived terms
* periodate * periodic acid English heteronyms ----

# amplitude

## English

(wikipedia amplitude)

### Noun

(en noun)
• The measure of something's size, especially in terms of width or breadth; largeness, magnitude.
• * Fuller
• The cathedral of Lincoln is a magnificent structure, proportionable to the amplitude of the diocese.
• * Milton
• amplitude of mind
• * Macaulay
• amplitude of comprehension
• (mathematics) The maximum absolute value of the vertical component of a curve or function, especially one that is periodic.
• (physics) The maximum absolute value of some quantity that varies.
• (astronomy) The arc of the horizon between the true east or west point and the center of the sun, or a star, at its rising or setting. At the rising, the amplitude is eastern or ortive: at the setting, it is western, occiduous, or occasive. It is also northern or southern, when north or south of the equator.
• (astronomy) The arc of the horizon between the true east or west point and the foot of the vertical circle passing through any star or object.
• (firearms) The horizontal line which measures the distance to which a projectile is thrown; the range.