Word.ws English Dictionary

hesperium

hesperium noun: a rejected name for plutonium. (Esperium chemical symbol: Es).

Noun

hesperium (uncountable)

  1. (obsolete) A rejected name for plutonium. (Esperium chemical symbol: Es)

Forms of hesperium

alternative formesperium

Origin of hesperium

From Italian Esperio after a Greek name of Italy + -ium, Ancient Greek Ἑσπερία (Hespería, “land of the west”).

Questions about hesperium

What does hesperium mean?
Hesperium means a rejected name for plutonium. (Esperium chemical symbol: Es).
What part of speech is hesperium?
Hesperium is a noun.

Words near hesperium in the dictionary

  1. hesperiine
  2. hesperiines
  3. hesperin
  4. hesperinos
  5. hesperitin
  6. hesperium
  7. hesperocyonine
  8. hesperomyine
  9. hesperomyines
  10. Hesperonesian
  11. hesperornithean

Source and license

Adapted from Wiktionary: hesperium (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “hesperium.” Word.ws, https://word.ws/hesperium. Based on Wiktionary, CC BY-SA 4.0.