Webster's Revised Unabridged Dictionary · 1913

Mamma

Mamma , noun

[Reduplicated from the infantine word ma, influenced in spelling by Latin mamma.]

Mother; -- word of tenderness and familiarity.
Tell tales papa and mamma. — Swift

Mamma , noun

[Latin mamma breast.]

(Anatomy) A glandular organ for secreting milk, characteristic of all mammals, but usually rudimentary in the male; a mammary gland; a breast; udder; bag.