ht

Short definition from Wiktionary

Noun

1. 1
   Abbreviation of height.
2. 2
   Initialism of hyperthreading.
3. 3
   Initialism of handy talkie.
4. 4
   Initialism of hat tip.
5. 5
   Initialism of heart transplant.
6. 6
   Initialism of Holmes tremor.
7. 7
   Initialism of half time.

Proper noun

1. 1
   Initialism of Hindustan Times, an Indian newspaper.

Symbol

1. 1
   Symbol for hectotesla, an SI unit of magnetic flux density equal to 10² teslas.