chlorophyll a

noun

The universal chlorophyll (C₅₅H₇₂MgN₄O₅) essential to the dominant oxygenic photosynthesis I process, present in all eukaryotes, cyanobacteria, chromists, and prochlorophytes that photosynthesize, and that contributes to the observed green color of these organisms.

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Meanings

nounchlorophyll a (uncountable)
  1. uncountableThe universal chlorophyll (C₅₅H₇₂MgN₄O₅) essential to the dominant oxygenic photosynthesis I process, present in all eukaryotes, cyanobacteria, chromists, and prochlorophytes that photosynthesize, and that contributes to the observed green color of these organisms.
Cite this entry
APA

chlorophyll a. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/chlorophyll%20a

MLA

“chlorophyll a.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/chlorophyll%20a. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “chlorophyll a,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/chlorophyll%20a.

Source: chlorophyll a on Wiktionary, CC BY-SA 4.0.