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1. Any of a class of extracellular proteins that are composed of three coiled polypeptide chains, form strong fibers, and are the main constituents of cartilage, bone, and other connective tissues in animals.
2. Material composed principally of collagen proteins. Collagen is converted into gelatin when boiled in water.

[Greek kolla, glue + -gen.]

col′la·gen′ic (-jĕn′ĭk), col·lag′e·nous (kə-lăj′ə-nəs) adj.
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Adj.1.collagenic - relating to or consisting of collagen
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Histologically, solid leiomyoma contains interlaced bundles of spindle-shaped or stellate smooth muscle cells with blunt-ended, elongated, pale-staining nuclei: lesions are rather cellular; yet, the packs of tumor cells are separated by collagenic strands.
The collagenic elasticity threads produce a dense elastic feeling that firmly cling to skin providing a contoured and defined appearance.
16 examined the gingival tissues surrounding the affected teeth and found a decreased collagenic network and extremely fragmented collagen fibers.