TESSA
Concise Oxford English Dictionary © 2008 Oxford University Press:
TESSA/ˈtɛsə/
▶noun (in the UK) a tax-exempt special savings account allowing savers to invest a certain amount without paying tax on the interest, provided that the capital remains in the account for five years (replaced in 1999 by the ISA).
'TESSA' also found in these Oxford entries:

