Mother-tongue

[muhth -er tuhng for 1; muhth -er tuhng for 2] /ˈmʌð ər ˈtʌŋ for 1; ˈmʌð ər ˌtʌŋ for 2/

noun
1.
the language first learned by a person; native language.
2.
.
noun
1.
the language first learned by a child
2.
a language from which another has evolved
noun

See native language

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Mother-wit
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Motherwort
[muhth -er-wurt, -wawrt] /ˈmʌð ərˌwɜrt, -ˌwɔrt/ noun 1. a European plant, Leonorus cardiaca, of the mint family, an introduced weed in the U.S., having cut leaves with a whorl of lavender flowers in the axils. /ˈmʌðəˌwɜːt/ noun 1. any of several plants of the Eurasian genus Leonurus, esp L. cardiaca, having divided leaves and clusters […]

Mother-yaw
noun, Pathology. 1. the initial lesion of yaws, occurring at the site of inoculation. mother yaw n. A large granulomatous lesion that may be the initial lesion in yaws and is most commonly present on the hand, leg, or foot. Also called buba madre, frambesioma.
Moth-mullein
noun 1. a weedy, European mullein, Verbascum blattaria, of the figwort family, having lance-shaped leaves and loose spikes of white or yellow flowers.