cover tile

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1. A tile, semicircular in shape, which fits over the joints in a tile roof.
2. One of the scales in ornamental imbrication.
References in periodicals archive ?
For instance, evaporation can be controlled via the use of individual plastic cover tiles or liquid cover slips.
The slides are protected from evaporation and drying with various techniques, including covering slides with other slides, cover tiles, or liquid coverslips.