a fine canal formed by invagination of the cell membrane into the cytoplasm of a cell, such as those of the parietal cells of the stomach.
in·tra·cel·lu·lar ca·na·lic·u·lus
(in'tră-sel'yū-lăr kan'ă-lik'yŭ-lŭs) A fine canal formed by invagination of the cell membrane into the cytoplasm of a cell, such as those of the parietal cells of the stomach.