For example whether an organism is unicellular or multicellular would be its _.

There is a word 'cellularity', though I don't think that is quite the word I am looking for.

  • If you needed a term for that property, in a context where the audience was familiar with both concepts, cellularity would work. But it's not a crucial characteristic; unicels are not monophyletic, except in the possible sense that all life is monophyletic. May 27, 2013 at 14:44
  • Isn't it cluster?
    – Ender
    May 27, 2013 at 14:46
  • classification?
    – user15851
    May 27, 2013 at 15:38
  • Cellular arity? Google gives me no hits, which is why this isn't an answer, but I like it as a phrase anyway.
    – Kaz Dragon
    May 28, 2013 at 11:50
  • The chapter in my high school science textbook was titled Cell Structure. May 28, 2013 at 17:03

2 Answers 2


As a sometime cell biologist, I offer that whether an organism is unicellular or multi-cellular is dependent upon its structure. I apologize if this feels overly simple, and there are other words that would suffice; however, it is certainly accurate to state that:

  • a single-celled organism is and has but one cell, in and around which all the activities of a living thing occur: metabolism, respiration and reproduction being the generally accepted definitions of life

  • a multi-cellular organism (that is not a colony of single-celled creatures but, rather, one living entity) has a body (structure) consisting of more than one cell, and these cells -- as a whole -- define the organism... and are all (generally) required for all life functions of the organism to take place.

Respectfully, Dr. Jonas Moses

  • Thank you, I suspected that it would be something as simple as that Jun 1, 2013 at 17:45

"Cell morphology" describes how it literally looks.

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