Relating to or characterized by outward movement or growth, especially in biological development.
From Greek 'ekto-' meaning 'outside' and 'batos' meaning 'passable' or 'able to walk,' combined with the suffix '-ic' to form an adjective describing external movement or progression.
This term reveals how scientists use Greek roots to describe developmental patterns—when organisms grow outward rather than inward, biologists have a precise word for it, showing how medical vocabulary builds meaning layer by layer like constructing a microscopic map.
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