rarefactionaladj.

Brit.

/ˌrɛːrᵻˈfakʃən(ə)l/,

/ˌrɛːrᵻˈfakʃn̩(ə)l/, U.S.

/ˌrɛrəˈfækʃ(ə)nəl/

Forms: see rarefaction n. and -al suffix¹.

Origin: Formed within English, by derivation. Etymons: rarefaction n., -al suffix¹.

Etymology: < rarefaction n. + -al suffix¹. Compare earlier rarefactive adj.

Of, relating to, or characterized by rarefaction.

ΘΚΠ

the world > matter > constitution of matter > lack of density > [adjective] > rarefied > rarefying or characterized by rarefaction

rarefactive?a1425

subtiliative?a1425

attenuant1603

subtilizing1611

subtiliating1659

rarefactional1909

1896 Proc. Royal Soc. 1895–6 59 272 The electric action..may not be sudden enough or violent enough to produce enough of longitudinal waves, or of condensational-rarefactional vibrations, to act sensibly on a photographic plate.]

1909 Cent. Dict. Suppl. Rarefactional, of or pertaining to rarefaction; pertaining to the density or pressure of a gaseous medium and to the resulting changes in its properties.

1925 Geogr. Jrnl. 65 49 Near the central region of the earthquake, condensational and rarefactional motions are intermingled.

1971 I. G. Gass et al. Understanding Earth xix. 272/1 On either side of the fault, the first waves to leave the source are compressions in the direction of motion and rarefactions away from it. This gives the symmetrical distribution of compressional and rarefactional first motions shown.

2003 Ultrasound in Med. & Biol. 29 1342/1 The..ultrasound peak rarefactional pressure amplitude..and mode of ultrasound delivery was evaluated.

This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022).

单词	rarefactional
释义	rarefactionaladj. Brit. /ˌrɛːrᵻˈfakʃən(ə)l/, /ˌrɛːrᵻˈfakʃn̩(ə)l/, U.S. /ˌrɛrəˈfækʃ(ə)nəl/ Forms: see rarefaction n. and -al suffix¹. Origin: Formed within English, by derivation. Etymons: rarefaction n., -al suffix¹. Etymology: < rarefaction n. + -al suffix¹. Compare earlier rarefactive adj. Of, relating to, or characterized by rarefaction. ΘΚΠ the world > matter > constitution of matter > lack of density > [adjective] > rarefied > rarefying or characterized by rarefaction rarefactive?a1425 subtiliative?a1425 attenuant1603 subtilizing1611 subtiliating1659 rarefactional1909 1896 Proc. Royal Soc. 1895–6 59 272 The electric action..may not be sudden enough or violent enough to produce enough of longitudinal waves, or of condensational-rarefactional vibrations, to act sensibly on a photographic plate.] 1909 Cent. Dict. Suppl. Rarefactional, of or pertaining to rarefaction; pertaining to the density or pressure of a gaseous medium and to the resulting changes in its properties. 1925 Geogr. Jrnl. 65 49 Near the central region of the earthquake, condensational and rarefactional motions are intermingled. 1971 I. G. Gass et al. Understanding Earth xix. 272/1 On either side of the fault, the first waves to leave the source are compressions in the direction of motion and rarefactions away from it. This gives the symmetrical distribution of compressional and rarefactional first motions shown. 2003 Ultrasound in Med. & Biol. 29 1342/1 The..ultrasound peak rarefactional pressure amplitude..and mode of ultrasound delivery was evaluated. This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022). < adj.1909
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