Associations to the word «Tetrapyrrole»

Wiktionary

TETRAPYRROLE, noun. (biochemistry) any of several natural pigments having a structure of four pyrrole rings connected by a one-carbon unit

Wise words

Words, words, words! They shut one off from the universe. Three quarters of the time one's never in contact with things, only with the beastly words that stand for them.
Aldous Huxley