Optical margin alignment outdents letters like A, V, W, Y, and punctuation into the margins to align the text border optically.
Chwaka Bay is a large indentation in the central east coast of the Tanzanian island of Unguja - the largest island of the Zanzibar Archipelago.
In cell biology, the Cleavage furrow is the indentation that begins the process of cleavage, by which animal cells undergo cytokinesis.
This indentation was called Cook Bay by the Australasian Antarctic Expedition, 1911–14, under Douglas Mawson, who named it for Joseph Cook, Prime Minister of Australia in 1914.
Off-side rule, an interpretation for indentation in some computer programming languages
In 1888, Fleming discovered the Horsehead Nebula on Harvard plate B2312, describing the bright nebula (later known as IC 434) as having "a semicircular indentation 5 minutes in diameter 30 minutes south of Zeta Orionis."