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tongue
tongue-and-groove joint
tongue depressor
tongue-in-cheek
tongue-lashing
tongue-tie
tongue-tied
tongue twister
tongue worm
tonic
tonic accent
tonic sol-fa
tonic water
tonicity
tonight
tonk
tonka bean
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tonoplast

to·no·plast [ tṓnə plàst ] (plural to·no·plasts)


noun 
Definition:
 
separating membrane in plant cell: the semipermeable membrane separating a fluid-filled internal cavity vacuole from the surrounding cytoplasm inside a plant cell

[Late 19th century. < Greek tonos "tension, tone"]
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