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Xiphisternumxiphium iris
Xiphius
Xiphodon
Xiphoid
xiphoid process
Xiphoidian
Xiphophyllous
Xiphosura
Xiphosurus polyphemus
Xiphura
Xishuangbanna Dai
XIV
XIX
Xizang
XKMS
-- XL --
xli
Xlib
xlii
xliii
XLINK
xlisp
xliv
xls
xlv
xlvi
xlvii
xlviii
XMAPI
Xmas
XMF
XMI
XL
| Noun | 1. |  XL - the cardinal number that is the product of ten and four |
| Adj. | 1. | xl - being ten more than thirty |