1. Former name of the Characidae
   - Characinidae

Type of: fish family

• Xylomelum pyriforme
• xylophone
• xylophonist
• Xylopia
• Xylopia aethiopica
• xylose
• xylosma
• Xylosma congestum
• Xyphophorus
• Xyphophorus helleri
• Xyridaceae
• Xyridales
• Xyris
• Xyris operculata
• xystus
• XYY
• y
• Y chromosome
• y'all
• y'know
• y-axis
• Y-fronts
• Y-linked gene
• Y-shaped
• Y2K