de Klerk 
(də klûrk, klĕrk), F(rederik) W(illem) Born 1936.
(də klûrk, klĕrk), F(rederik) W(illem) Born 1936. South African president (1989-1994) who shared the 1993 Nobel Peace Prize with Nelson Mandela for his efforts toward ending apartheid.
- thermogenesis
- thermogenetic
- thermogenic
- thermogram
- thermograph
- thermographic
- thermographically
- thermography
- thermohaline
- thermojunction
- thermokarst
- thermolabile
- thermolability
- thermoluminescence
- thermoluminescent
- thermolysis
- thermolytic
- thermometer
- thermometric
- thermometry
- thermomotor
- thermonuclear
- thermoperiodicity
- thermoperiodism
- thermophile