Первая составная часть сложных слов, обозначающая: внутренний, например: эндотермический, эндодерма, эндопаразит.
{От греч. 'ένδον — внутри}
"It is better to know some of the questions than all of the answers." James Thurber
"This is the most joyful day that ever I saw in my pilgrimage on earth." Donald Cargill
"Life is but thought." Sara Teasdale
"It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow." Robert H. Goddard
