A structure or organ found in the head region, particularly in certain lichens and algae.
From Greek 'kephale' (head) + '-odium' (diminutive suffix). Refers to a distinct head-like structure in these organisms.
Lichens are amazing composite organisms (fungus plus algae living together), and some have specialized cephalodia structures that house their algae partners separately—nature's version of having a specialized apartment for your roommate.
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