IODP SEDIS - Thesaurus -

Tc
USE	technetium

Tc-99
BT	isotopes
	.radioactive isotopes
	..Tc-99
BT	metals
	.technetium
	..Tc-99
SN	This term has multiple hierarchies.

TCDD
USE	dioxins

TCE
SN	Not a valid term for GeoRef. See trichloroethylene or tetrachloroethylene. May also be used for trichloroethanol, and thermal coefficient of expansion.

Tchornozem
USE	Chernozems