tylosis

[ tahy-loh-sis ]
/ taɪˈloʊ sɪs /

noun, plural ty·lo·ses [tahy-loh-seez] /taɪˈloʊ siz/. Botany.

a bubblelike formation in the cavity of tracheids or vessels in the wood of trees, consisting of protoplasm intruded from adjacent parenchyma cells.
Often ty·lose [tahy-lohs, tahy-lohs] /ˈtaɪ loʊs, taɪˈloʊs/.

Origin of tylosis

1875–80; < Greek týlōsis act of making callous, equivalent to tylō-, variant stem of tyloûn to make callous, hard, derivative of týlos callus, lump, knob + -sis -sis

Words nearby tylosis

British Dictionary definitions for tylosis

tylosis
/ (taɪˈləʊsɪs) /

noun

botany a bladder-like outgrowth from certain cells in woody tissue that extends into and blocks adjacent conducting xylem cells

Word Origin for tylosis

C19: from Greek tulōsis, from tulos knob or tulē callus + -osis

Medical definitions for tylosis

tylosis
[ tī-lō-sĭs ]

n. pl. ty•lo•ses (-sēz)

Inflammation of the eyelids, characterized by thickening and hardening of the edges.
A thickening of the horny layer of the skin as a result of chronic pressure or friction.