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tera-second
tera-second n.
Brit. 
/ˈtɛrəˌsɛk(ə)nd/
, /ˈtɛrəˌsɛk(ə)nd/U.S. /ˈtɛrəˌsɛkən(d)/
/ˈtɛrəˌsɛkən(d)/ΚΠ
1969 Proc. Geol. Soc. Aug. 142 Alternatively the second of time may prove to be a more convenient unit as recommended by S.I., thus 1 million years (m.y.) = 31·557 tera seconds (Ts).
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