What is the X in X-mas?

5

6

Scrabble
Words With Friends

- binomial distribution
- binomial experiment
- binomial law
- binomial name
- binomial nomenclature
- binomial series
- binomial theorem
- binominal
- binominal name
- binormal
- binos
- binotic
- binovular
- binoxalate
- binprolog
- bins
- binswanger's disease
- bint
- binturong
- binuclear
- binuclear family
- binucleate
- binucleolate
- binyon
- bio
- bio logical half life's
- bio-
- bio-organism
- bio-security
- bio-warfare
- bio.
- bioaccumulate
- bioaccumulation
- bioacoustics
- bioactive
- bioactivity
- bioaeration
- bioaeronautics
- bioarchaeology
- bioassay
- bioastronautics
- bioautography
- bioavailability
- biobank
- biobehavioral
- biobehavioral science
- biobibliography
- biocatalyst
- biocellate
- biocenology
- biocenosis