metaboricadj.

Brit.

/mɛtəˈbɔːrɪk/, U.S.

/ˌmɛdəˈbɔrɪk/

Origin: Formed within English, by derivation. Etymons: meta- prefix, boric adj.

Etymology: < meta- prefix + boric adj. Compare earlier metaborate n.

Chemistry.

metaboric acid n. the least hydrated of the oxoacids of boron, obtained by heating (ortho)boric acid, and occurring in several forms with the general formula HBO₂; esp.B₃O₃(OH)₃.

ΚΠ

1888 C. L. Bloxam Chem. (ed. 6) 120 This is sometimes written H₂B₄O₇, and called pyroboric acid, whilst H₂O·B₂O₃ is HBO₂, metaboric acid, and the crystals, H₃BO₃, are orthoboric acid.

1907 G. S. Newth Text-bk. Inorg. Chem. (ed. 12) iii. viii. 609 Boron forms three oxyacids, namely—Orthoboric acid, B(HO)₃, or H₃BO₃. Metaboric acid, B₂O₂(HO)₂, or H₂B₂O₄... Pyroboric acid, B₄O₅(HO)₂, or H₂B₄O₇.

1988 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 5) vi. 70 When heated, boric acid loses water stepwise... The intermediate substance, metaboric acid (HBO₂), exists in three modifications.

1999 Jrnl. Organometallic Chem. 588 108/1 Sibyl and stannyl esters of orthoboric, metaboric, and arylboronic acids.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	metaboric
释义	metaboricadj. Brit. /mɛtəˈbɔːrɪk/, U.S. /ˌmɛdəˈbɔrɪk/ Origin: Formed within English, by derivation. Etymons: meta- prefix, boric adj. Etymology: < meta- prefix + boric adj. Compare earlier metaborate n. Chemistry. metaboric acid n. the least hydrated of the oxoacids of boron, obtained by heating (ortho)boric acid, and occurring in several forms with the general formula HBO₂; esp.B₃O₃(OH)₃. ΚΠ 1888 C. L. Bloxam Chem. (ed. 6) 120 This is sometimes written H₂B₄O₇, and called pyroboric acid, whilst H₂O·B₂O₃ is HBO₂, metaboric acid, and the crystals, H₃BO₃, are orthoboric acid. 1907 G. S. Newth Text-bk. Inorg. Chem. (ed. 12) iii. viii. 609 Boron forms three oxyacids, namely—Orthoboric acid, B(HO)₃, or H₃BO₃. Metaboric acid, B₂O₂(HO)₂, or H₂B₂O₄... Pyroboric acid, B₄O₅(HO)₂, or H₂B₄O₇. 1988 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 5) vi. 70 When heated, boric acid loses water stepwise... The intermediate substance, metaboric acid (HBO₂), exists in three modifications. 1999 Jrnl. Organometallic Chem. 588 108/1 Sibyl and stannyl esters of orthoboric, metaboric, and arylboronic acids. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < adj.1888
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