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| ty·lo·sis [ tī lṓssiss ] or ty·lose [ t lss ] (plural ty·lo·ses [ tī lṓ sz ]) |
noun |
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| Definition: |
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1. thickening of eyelids: a callus or thickening, especially of the eyelids
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2. sac growing in tree wood: a sac that forms in the water-conducting vessels of the older wood of a tree, often in response to drought or disease. Tyloses may cause blockage, and often fill with resins, gums, or pigments that may help to preserve, strengthen, or color the wood or provide a source of dyes.
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| [Late 19th century. Via modern Latin< Greek tulōsis "formation of a callus or lump" < tulē "callus, swelling"] |
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