actino-

prefix

ray, ray-shaped

“e.g. actinolite, actinomycete”

OriginAncient Greek ἀκτίς →
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Meanings

prefix

alternative actin-

  1. biologyray, ray-shaped

    e.g. actinolite, actinomycete

  2. biologyradial geometry, particular radial symmetry

    e.g. actinogonidial, actinostele, actinomorphic

  3. natural sciencesactinic radiation

    e.g. actinometer, actinochemistry, actinotherapy

Origin

  1. Ancient Greekἀκτίς“ray”
  2. Englishactino-

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

More words from Ancient Greek

Full word history & related roots →

Translations

Afrikaans aktino-, aktino-
  • aktino-having a radial form
  • aktino-related to actinic radiation
Irish achtana-
  • achtana-related to actinic radiation
Polish aktyno-
  • aktyno-having a radial form
Portuguese actino-
  • actino-having a radial form
Cite this entry
APA

actino-. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/actino-

MLA

“actino-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/actino-. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “actino-,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/actino-.

Source: actino- on Wiktionary, CC BY-SA 4.0.