mother tongue
— Noun
– English
～ one's native language; the language learned by children and passed from one generation to the next
mother-in-law's tongue
— Noun
– English
～ an evergreen plant with large showy dark green leaves; contains a poison that swells the tongue and throat hence the name
mother-in-law's tongue
— Noun
– English
～ stemless plant having narrow rigid leaves often cultivated as a houseplant