annelationn.

Brit.

/ˌanəˈleɪʃn/,

/ˌanlˈeɪʃn/, U.S.

/ˌænəˈleɪʃən/

Forms: 1800s– annellation, 1900s– anellation, 1900s– annelation.

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin ānellus , -ation suffix.

Etymology: < classical Latin ānellus small ring (see aneus n.) + -ation suffix. In sense 2 after German Anellierung (O. Hinsberg 1902, in Chemisches Central-Blatt 73 358). Compare annulation n. Additions 2.Forms with ann- are probably after post-classical Latin annellus (16th cent.), variant of classical Latin ānellus.

1. Biology. A small ringlike marking or structure.

ΚΠ

1860 Proc. Zool. Soc. London 28 420 The hair is of a uniform brown without annellations, and the naked face black.

1963 W. B. Cooke Lab. Guide Fungi Polluted Waters 61 The hypha may grow beyond the scar, produce another spore, and leave another scar, thus producing a series of annelations.

2006 Mycologia 98 431 Proliferating percurrently with up to 1 annellation.

2. Chemistry. A reaction or process in which one or more molecular rings are formed by attachment of atoms to an existing molecule (typically a cyclic hydrocarbon). Also called annulation.

ΚΠ

1935 A. M. Patterson German-Eng. Dict. Chemists (ed. 2) 19/1 Anellierung, anellation (see anellieren [glossed as ‘join by “ortho fusion” as the two rings in naphthalene’]).

1948 Jrnl. Soc. Chem. Ind. 67 117/2 This fact recalls the old rule that cyclization of a 2-substituted naphthalene leads to angular and not to linear annellation, and it suggests that interconversion of phenanthrene and anthracene is possible.

1964 E. Clar Polycyclic Hydrocarbons I. i. 4 Hydrocarbons which are formed by linear annellation of benzene rings are called ‘acenes’.

1987 A. Nickon & E. F. Silversmith Org. Chem.: Name Game vi. 87 The annelation at each extremity produces the homologous pentacycle..which can grow to 11 rings..after three repetitions of the sequence.

2010 Tetrahedron 66 3223/1 The annelation step could, in principle, provide two products depending upon the site of ring closure.

This is a new entry (OED Third Edition, June 2022).

单词	annelation
释义	annelationn. Brit. /ˌanəˈleɪʃn/, /ˌanlˈeɪʃn/, U.S. /ˌænəˈleɪʃən/ Forms: 1800s– annellation, 1900s– anellation, 1900s– annelation. Origin: A borrowing from Latin, combined with an English element. Etymons: Latin ānellus , -ation suffix. Etymology: < classical Latin ānellus small ring (see aneus n.) + -ation suffix. In sense 2 after German Anellierung (O. Hinsberg 1902, in Chemisches Central-Blatt 73 358). Compare annulation n. Additions 2.Forms with ann- are probably after post-classical Latin annellus (16th cent.), variant of classical Latin ānellus. 1. Biology. A small ringlike marking or structure. ΚΠ 1860 Proc. Zool. Soc. London 28 420 The hair is of a uniform brown without annellations, and the naked face black. 1963 W. B. Cooke Lab. Guide Fungi Polluted Waters 61 The hypha may grow beyond the scar, produce another spore, and leave another scar, thus producing a series of annelations. 2006 Mycologia 98 431 Proliferating percurrently with up to 1 annellation. 2. Chemistry. A reaction or process in which one or more molecular rings are formed by attachment of atoms to an existing molecule (typically a cyclic hydrocarbon). Also called annulation. ΚΠ 1935 A. M. Patterson German-Eng. Dict. Chemists (ed. 2) 19/1 Anellierung, anellation (see anellieren [glossed as ‘join by “ortho fusion” as the two rings in naphthalene’]). 1948 Jrnl. Soc. Chem. Ind. 67 117/2 This fact recalls the old rule that cyclization of a 2-substituted naphthalene leads to angular and not to linear annellation, and it suggests that interconversion of phenanthrene and anthracene is possible. 1964 E. Clar Polycyclic Hydrocarbons I. i. 4 Hydrocarbons which are formed by linear annellation of benzene rings are called ‘acenes’. 1987 A. Nickon & E. F. Silversmith Org. Chem.: Name Game vi. 87 The annelation at each extremity produces the homologous pentacycle..which can grow to 11 rings..after three repetitions of the sequence. 2010 Tetrahedron 66 3223/1 The annelation step could, in principle, provide two products depending upon the site of ring closure. This is a new entry (OED Third Edition, June 2022). < n.1860
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