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Related to coir: perlite
The fiber obtained from the husk of a coconut, used in making rope and matting and as a medium for cultivating plants.
[Malayalam kayar, cord, from kayaru, to be twisted.]
(Textiles) the fibre prepared from the husk of the coconut, used in making rope and matting
[C16: from Malayalam kāyar rope, from kāyaru to be twisted]
the prepared fiber of the husk of the coconut, used in making rope, matting, etc.
[1575–85; Tamil kayiṟu rope]