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Xanthippe Socrates' wife, said to have been a shrew. III.5
Xaritas [see Charity]. II.1
ξ (xi) Greek letter. I.14
as an unknown variable. I.19
as a sign for ‘end’. I.24
as a symbol of self-destructive progress. I.14
X-ray as a method of making an unseen pattern visible. I.20
film, interpretation of; cf. the interpretation of a mathematical formula. I.21