[f. LOBATE: see -ATION.] The formation of lobes; the condition of being lobate.

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1840.  Blyth, etc. Cuvier’s Anim. Kingd. (1849), 246. The Phalaropes which it [sc. the Lobefoot] resembles in the lobation of its toes.

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1846.  Dana, Zooph. (1848), 647. The lobations of an oak-leaf.

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1880.  Gray, Struct. Bot., III. iv. 98. Lobation or segmentation.

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1889.  Nature, 3 Oct., 558. Suggestions are made upon the subject of progressive lobation [in ice formations].

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1890.  Coues, Field & Gen. Ornithol., II. 190. This lobation of the hallux is seen … in all truly lobe-footed birds.

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