堀割

(1)a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance; "the tear duct was obstructed"; "the alimentary canal"; "poison is released through a channel in the snake's fangs"

(2)上皮細胞で内側を覆われ、分泌または他の物質を運んでいる身体の通路または管

(3)a long narrow excavation in the earth

(4)地面に開いた長く狭い穴

(5)long and narrow strip of water made for boats or for irrigation

(6)ボート、あるいはかんがい用に作られた、細長い水路

(7)(astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion

(8)かつて、水路のシステムであると思われていた火星の不明瞭な表面の特徴

(9)現在は光学的錯覚と考えられている