Plural of ampullula; multiple small flask-shaped structures.
From Latin ampullula + -ae (plural nominative ending). The standard Latin plural form of ampullula, maintaining the classical declension pattern.
The ampullulae found on the tube feet of sea urchins and starfish are among nature's tiniest hydraulic systems—they use water pressure to move and grip, which is absolutely wild when you think about how life-sized hydraulics work in machinery.
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