Word Pronunciation & Dictionary

directional derivative

Word Rarity Rare

Frequency: Zipf frequency 3.19 in modern English

Syllables: di-rec-tion-al deriva-tive
IPA

31

Scrabble Score

21

Letters

5

Syllables

11

Unique Chars

Meaning

noun

A function which measures the rate of change of some other function at any point in a particular direction; formally, the directional derivative of a scalar function f( mathbf x)=f(x_1,x_2,…,x_n) along a vector mathbf v=(v_1,…,v_n) is the function ∇_(mathbf v)f defined by the limit ∇_(mathbf v)f( mathbf x)= lim _(h→0)(f( mathbf x+h mathbf v)-f( mathbf x))/h.

Inflected Forms

directional derivatives (plural)

Questions

What does directional derivative mean?: A function which measures the rate of change of some other function at any point in a particular direction; formally, the directional derivative of a scalar function f( mathbf x)=f(x_1,x_2,…,x_n) along a vector mathbf v=(v_1,…,v_n) is the function ∇_(mathbf v)f defined by the limit ∇_(mathbf v)f( mathbf x)= lim _(h→0)(f( mathbf x+h mathbf v)-f( mathbf x))/h.

How to pronounce directional derivative

Open the pronunciation page — Open the Speakur entry for “directional derivative”.
Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
Play the audio — Click Play to hear reference audio for “directional derivative”.
Repeat and practice — Say “directional derivative” aloud, matching stress and vowels until it feels natural.