Word.ws English Dictionary

actino-

actino- prefix: ray, ray-shaped.

Prefix

actino-

  1. ray, ray-shaped
    • e.g. actinolite, actinomycete
  2. radial geometry, particular radial symmetry
    • e.g. actinogonidial, actinostele, actinomorphic
  3. actinic radiation
    • e.g. actinometer, actinochemistry, actinotherapy

Forms of actino-

alternative formactin-

Origin of actino-

From Ancient Greek ἀκτίς (aktís, “ray”).

Questions about actino-

What does actino- mean?
Actino- means ray, ray-shaped.
What part of speech is actino-?
Actino- is a prefix.

Words near actino- in the dictionary

  1. actinium-K
  2. actiniums
  3. actinizoa
  4. actinizoan
  5. actinizoans
  6. actino-
  7. actino-uranium
  8. actinobacillary
  9. actinobacilli
  10. actinobacillosis
  11. actinobacillotic

Source and license

Adapted from Wiktionary: actino- (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.

Last updated:

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