pneumaticityn.

Brit.

/ˌnjuːməˈtɪsᵻti/, U.S.

/ˌn(j)uməˈtɪsᵻdi/

Origin: Formed within English, by derivation. Etymons: pneumatic adj., -ity suffix.

Etymology: < pneumatic adj. + -ity suffix; compare -icity suffix. Compare French pneumaticité (1878 in this sense; apparently earlier in sense ‘state of a body in which the air can circulate easily’ (1842)).R. G. Mayne (see quot. 1858) gives also a Latin form pneumaticitas.

Zoology.

The property or condition of being pneumatic (pneumatic adj. 3b); a pneumatic state.

ΘΚΠ

the world > matter > gas > air > [noun] > quality of containing air-cavities

pneumaticity1858

1858 R. G. Mayne Expos. Lexicon Med. Sci. (1860) 984/2 Pneumaticitas, term for that condition of the skeleton of birds into most of the bones of which the external air has the faculty of entering: pneumaticity.

1870 G. Rolleston Forms Animal Life 17 The greater pneumaticity which the individual bones ordinarily possess.

1917 R. S. Lull Org. Evol. iii. xxxi. 532 The birds also have developed pneumaticity of the skeleton for lightness.

1991 Philos. Trans. (Royal Soc.) B. 332 316 Highly pneumatized basioccipital... Such elaborate pneumaticities are lacking in Protoavis and birds.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online June 2022).

单词	pneumaticity
释义	pneumaticityn. Brit. /ˌnjuːməˈtɪsᵻti/, U.S. /ˌn(j)uməˈtɪsᵻdi/ Origin: Formed within English, by derivation. Etymons: pneumatic adj., -ity suffix. Etymology: < pneumatic adj. + -ity suffix; compare -icity suffix. Compare French pneumaticité (1878 in this sense; apparently earlier in sense ‘state of a body in which the air can circulate easily’ (1842)).R. G. Mayne (see quot. 1858) gives also a Latin form pneumaticitas. Zoology. The property or condition of being pneumatic (pneumatic adj. 3b); a pneumatic state. ΘΚΠ the world > matter > gas > air > [noun] > quality of containing air-cavities pneumaticity1858 1858 R. G. Mayne Expos. Lexicon Med. Sci. (1860) 984/2 Pneumaticitas, term for that condition of the skeleton of birds into most of the bones of which the external air has the faculty of entering: pneumaticity. 1870 G. Rolleston Forms Animal Life 17 The greater pneumaticity which the individual bones ordinarily possess. 1917 R. S. Lull Org. Evol. iii. xxxi. 532 The birds also have developed pneumaticity of the skeleton for lightness. 1991 Philos. Trans. (Royal Soc.) B. 332 316 Highly pneumatized basioccipital... Such elaborate pneumaticities are lacking in Protoavis and birds. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online June 2022). < n.1858
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