Plural of gibbosity; the quality or state of being humped, swollen, or bulging outward.
From Latin gibbosus (humped, hunchbacked) + -ity (suffix forming nouns of quality). The Latin root gibbus meant 'hump' or 'bump,' and the -osity suffix evolved to denote the condition or quality of having that attribute.
This word is the medical and anatomical term for conditions like kyphosis, where the spine curves outward—it's literally describing the shape of disease! The root word gibbus is so old that it appears in Roman medical texts.
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