Sticky, slimy, or viscous in quality; having the nature of glue.
From Latin glutinosus, derived from gluten (glue). The -ous suffix indicates a quality or characteristic, and has been part of English since medieval times when we borrowed heavily from Latin and French.
Glutinous is the word you'd use to describe mochi (that chewy Japanese rice cake), certain fish species, or anything with that unpleasant sticky-slimy quality—it's oddly specific to that exact texture.
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