look-through

[loo k-throo] /ˈlʊkˌθru/
noun
1.
the opacity and texture of paper when inspected by transmitted light.
Also called see-through.
Compare look-down.
Origin
1935-40
British Dictionary definitions for look through

look through

verb
1.
(intransitive, preposition) or tr, adverb. to examine, esp cursorily: he looked through his notes before the lecture
2.
(intransitive, preposition) to ignore (a person) deliberately: whenever he meets his ex-girlfriend, she looks straight through him