There are 2 definitions of Tm in English:

Tm1

Line breaks: Tm

symbol

The chemical element thulium.

Definition of Tm in:

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Word of the day neoteny
Pronunciation: niːˈɒt(ə)ni
noun
retention of juvenile features in the adult animal

There are 2 definitions of Tm in English:

TM2

Line breaks: TM
Pronunciation: /tiːˈɛm
 
/

abbreviation

( trademark in the US)
Transcendental Meditation.

Definition of Tm in: