Literally meaning: “drinking body(vesicle)”
Origin: Anc Greek
+σώμα/soma(body) > σύμα/sima(=corpse). Homer (9th cen) reffered to word "σώμα" with the meaning of the corpse.
Pinosome is a small intracellular fluid-filled vesicle (smaller than phagosomes) formed by the budding off of the plasma membrane through the process of pinocytosis