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tubulation
tubulation n. 
/tjuːbjʊˈleɪʃən/ [ < Latin tubulātiōn-em, noun of action < tubulus , tubule n., as if < *tubulāre] the process of making or becoming tubular.
/tjuːbjʊˈleɪʃən/ [ < Latin tubulātiōn-em, noun of action < tubulus , tubule n., as if < *tubulāre] the process of making or becoming tubular.ΘΚΠ
the world > space > shape > curvature > curved three-dimensional shape or body > cylinder > [noun] > quality of being hollow cylinder > making or becoming
tubulation1866
1656 T. Blount Glossographia Tubilation [1674 Tubulation] (tubulatio), a making hollow like pipes.
1866 Reader No. 163. 154/1 Pseudopodial tubulation.
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