henna/ˈhenə; `hɛnə/ n[U]1 reddish-brown dye used esp on the hair 散沫花染剂（一种棕红色的染料, 尤用以染发）.2 tropical plant from which this dye is obtained 散沫花（热带植物, 可制染剂）.
牛津英汉双解词典