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‖n. pl. [ NL. aptera, fr. Gr. &unr_; without wings; 'a priv. + &unr_; wing, &unr_; to fly. ] (Zool.) Insects without wings, constituting the seventh Linnæn order of insects, an artificial group, which included Crustacea, spiders, centipeds, and even worms. These animals are now placed in several distinct classes and orders. [ 1913 Webster ]

a. 1. (Zool.) Apterous. [ 1913 Webster ]

2. (Arch.) Without lateral columns; -- applied to buildings which have no series of columns along their sides, but are either prostyle or amphiprostyle, and opposed to peripteral. R. Cyc. [ 1913 Webster ]

n. (Zool.) One of the Aptera. [ 1913 Webster ]

‖n. pl. [ NL. See Aptera. ] (Zool.) Naked spaces between the feathered areas of birds. See Pteryliæ. [ 1913 Webster ]

a. 1. (Zool.) Destitute of wings; apteral; as, apterous insects. [ 1913 Webster ]

2. (Bot.) Destitute of winglike membranous expansions, as a stem or petiole; -- opposed to alate. [ 1913 Webster ]

‖n. pl. [ NL. See Apteryx. ] (Zool.) An order of birds, including the genus Apteryx. [ 1913 Webster ]

n. 1. 1 a ratite bird order: flightless ground birds having vestigial wings and long bills and small eyes: kiwis.
Syn. -- order Apterygiformes [ WordNet 1.5 ]

‖n. [ Gr. 'a priv. + pte`ryx wing. Cf. Aptera. ] (Zool.) A genus of New Zealand birds about the size of a hen, with only short rudiments of wings, armed with a claw and without a tail; the kiwi. It is allied to the gigantic extinct moas of the same country. Five species are known. [ 1913 Webster ]

n. [ OF. chapitre, F. chapitre, fr. L. capitulum, dim. of caput head, the chief person or thing, the principal division of a writing, chapter. See Chief, and cf, Chapiter. ] 1. A division of a book or treatise; as, Genesis has fifty chapters. [ 1913 Webster ]

2. (Eccl.) (a) An assembly of monks, or of the prebends and other clergymen connected with a cathedral, conventual, or collegiate church, or of a diocese, usually presided over by the dean.(b) A community of canons or canonesses.(c) A bishop's council.(d) A business meeting of any religious community. [ 1913 Webster ]

3. An organized branch of some society or fraternity as of the Freemasons. Robertson. [ 1913 Webster ]

4. A meeting of certain organized societies or orders. [ 1913 Webster ]

5. A chapter house. [ R. ] Burrill. [ 1913 Webster ]

6. A decretal epistle. Ayliffe. [ 1913 Webster ]

7. A location or compartment. [ 1913 Webster ]

In his bosom! In what chapter of his bosom? Shak. [ 1913 Webster ]

Chapter head, or
Chapter heading, that which stands at the head of a chapter, as a title. --
Chapter house, a house or room where a chapter meets, esp. a cathedral chapter. --
The chapter of accidents, chance. Marryat. [ 1913 Webster ]

v. t. 1. To divide into chapters, as a book. Fuller. [ 1913 Webster ]

2. To correct; to bring to book, i. e., to demand chapter and verse. [ Obs. ] Dryden. [ 1913 Webster ]

‖/mhw>, n. (Zool.) See Dermoptera, Dermopteran.

a. [ Hexa- + Gr. &unr_; wing. ] (Bot.) Having six processes. Gray.

n. An intervening or inserted chapter. [ 1913 Webster ]

‖prop. n. [ NL., from Gr. malako`s soft + ptero`n wing + o'yra` tail. ] (Zool.) A genus of African siluroid fishes, including the electric catfishes. See Electric cat, under Electric. [ Sometimes spelled Malopterurus. ] [ 1913 Webster ]

prop. n. (Zool.) The species name of the electric catfish, a freshwater catfish of the Nile and tropical central Africa having an electric organ. [ WordNet 1.5 ]

‖n. [ NL., fr. Gr. &unr_; after + &unr_; fin. ] (Anat.) The posterior of the three principal basal cartilages in the fins of fishes. -- Me*tap`ter*yg"i*al a. [1913 Webster]

n. [ Paleo- + apteryx. ] (Paleon.) A large extinct ostrichlike bird of New Zealand. [ 1913 Webster ]

‖n.; pl. Paraptera [ NL. See Para-, and Pteron. ] (Zool.) A special plate situated on the sides of the mesothorax and metathorax of certain insects. [ 1913 Webster ]

n. A raptor. [ Obs. ] Drayton. [ 1913 Webster ]

n. [ See Tetrapterous. ] (Zool.) An insect having four wings. [ 1913 Webster ]