Speakur

Word Pronunciation & Dictionary

actinide

/ˈæktɪnaɪd/

Word Rarity Very rare

Frequency: 1.91 in modern English

Syllables
ac-tinide
IPA
/ˈæktɪnaɪd/
11
Scrabble Score
8
Letters
3
Syllables
7
Unique Chars

Meaning

noun

Any of the 15 radioactive elements of the periodic table from actinium to lawrencium that are positioned under the lanthanides, to which they have similar chemistry.

noun

Any of the 14 elements from actinium to nobelium (lawrencium is excluded by some authors as it is a d-block rather than an f-block element).

noun

Any of the 14 elements from thorium to lawrencium (actinium having been mistakenly excluded because it was thought to be a d-block element in the past).

Dated

Etymology

From actin- + -ide.

Word Breakdown

Usage

Subject

Wiktionary places this term in Chemistry.

Inflected Forms

actinides (plural)

Derived Forms

actinidic nonactinide organoactinide radioactinide superactinide transactinide

Frequently Paired Words

actinium thorium protactinium uranium neptunium plutonium americium curium

Synonyms

actinoid actinon

Questions

How do you pronounce actinide?
The recorded pronunciation is /ˈæktɪnaɪd/.
What does actinide mean?
Any of the 15 radioactive elements of the periodic table from actinium to lawrencium that are positioned under the lanthanides, to which they have similar chemistry.
Where does actinide come from?
From actin- + -ide.

How to pronounce actinide

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