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yipee
yippie
yips
yissus
Yizkor
-yl
ylang-ylang
yld
ylem
YMCA (1)
YMCA (2)
YMHA
Ymir
Ymodem
yo
yo-heave-ho
yo madd phat
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ylem

y·lem [ ləm ]


noun 
Definition:
 
primordial matter: hypothetical matter that, according to the big bang theory of the origin of the universe, was the substance from which the chemical elements were formed

[Mid-20th century. < medieval Latin hylem "universal matter" < Greek hulē "wood, matter"]
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