1. An American agave plant (Agave fourcroydes) which has large, thick leaves similar in shape to a sword and gives a red-colored fiber which is hard and used in producing twine, ropes, and coarse fabrics: "Grandmother Ruby was surprised when she saw the henequen that was growing in the garden behind her new house, and she hoped to use its leaves for making strong thread for herself!"

"The hammock, that was made of henequen, belonged to Lois's grandmother, and it was still as good as new after several years of use!"
3. Etymology: from Spanish "henequén", possibly from Arawakan.