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Webster 1913 Edition
Mamma
Mam-ma′
,Noun.
 [Reduplicated from the infantine word 
ma
, influenced in spelling by L. mamma
.] Mother; – word of tenderness and familiarity. 
[Written also 
mama
.] Tell tales papa and 
 mamma
. Swift.
Mam′ma
,Noun.
pl. 
Mammae 
(#)
. [L. 
mamma 
breast.] (Anat.) 
A glandular organ for secreting milk, characteristic of all mammals, but usually rudimentary in the male; a mammary gland; a breast; udder; bag. 
Webster 1828 Edition
Mamma
MAMM`A
,Noun.
 A familiar word for mother,used by young children.