Definition of "rugous" [ru•gous]

• Wrinkled; rugose (adjective)

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• "The exterior face of blocks to be coated with mortar or renderings should preferably be rugous, while those which do not receive a coating must be smooth."
• "The èpicarp, or outer membrane, is slightly rugous."
• "It seizes the leaves with its long rugous and narrow tongue by rolling it about them, and seems annoyed when it is obliged to take any thing from the ground, which it seems to do with difficulty."