useless trivia: What Word Means: Pertaining To A Type Of Culture Medium?

Questions

"He must have a truly ------------ nature, for he weeps when there is nothing at all to weep about."- Oscar Wilde?

"He that always gives way to others will end in having no ----------- of his own."- Aesop?

"-------------- is the inner voice which warns us somebody may be looking."- Henry Louis Mencken - 1949?

"He who angers you ------------ you."- Elizabeth Kenny?

"------------- is the last resort of the unimaginative."- Oscar Wilde?