History
There is no specific element that is symbolic of proteins.
The absence of the sun
It depends which dictionary. The Oxford English Dictionary gives some 50 meanings, three rare and obsolete verb meanings, and 47 noun meanings grouped into four main groups and 15 subgroups. The Concise Oxford gives 12, under 9 main meanings, and a number of expressions containing the word. Webster's New Collegiate gives ten under 8 main meanings. Merriam-Webster has six. I don't have a Collins at hand.
It gives the meaning of words.
The Dreaming has different meanings for different Aboriginal groups. The Dreaming can be seen as the embodiment of Aboriginal creation, which gives meaning to everything - the essence of Aboriginal belief about creation, spiritual and physical existence. It establishes the rules governing relationships between the people, the land and all things for Aboriginal people. Story telling is an integral part of the Australian indigenous people. The stories tell how the land came to be shaped and inhabited how to behave and why; where to find certain foods, etc.
The link below (related links) gives 75 meanings for PCC. There are more!
because it gives meanings
he tells them to make stories, and whoever gives the best stories gets a prize
The earth and cities are full of layers of time. In places like Rome people have built layer on layer on top of each other. With just a few steps you can go back a thousand years. Places like Pompeii are buried all around the world and they uncover ancient civilizations finding the things they used. Writings are left for us and passed down through the centuries. Art gives a great deal about societies. The things put into paintings have meanings and are symbolic.
Thesaurus. Roget's Thesaurus is the most famous example.
The glossary gives the meanings of words used in a particular text; it usually gives meanings of unusual words or words the average reader might not know. Many texts of Shakespeare's plays, for example, include a glossary at the end, since the language he used has changed so much over the centuries.
The answer is do the actual reading and get your degree honestly like the rest of us you mooch.