proplydn.

Brit.

/ˈprəʊplɪd/, U.S.

/ˈproʊpləd/

Origin: Formed within English, by compounding. Etymons: protoplanetary adj., disc n.

Etymology: < pro- + -pl- + -y (elements of protoplanetary adj.) + d- (in disc n.).

Astronomy.

An opaque disc of gas and dust orbiting a young star, thought to be an embryonic planetary system; a protoplanetary disc.

ΚΠ

1992 United Press Internat. Newswire (Nexis) 17 Dec. The disks, dubbed Proplyds, are bright enough to have been seen from Earth-based telescopes.

1993 C. R. O'Dell et al. in Astrophysical Jrnl. 410 699/1 The key to each CS [sc. compact source] is its high-density neutral core, which is probably a protoplanetary disk (proplyd) overtaken by the advancing ionization of M42.

2001 C. A. Pickover Stars of Heaven vi. 92 The Orion proplyds are larger than the Sun's solar system and contain enough gas and dust to provide the raw material for future planetary systems.

This is a new entry (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	proplyd
释义	proplydn. Brit. /ˈprəʊplɪd/, U.S. /ˈproʊpləd/ Origin: Formed within English, by compounding. Etymons: protoplanetary adj., disc n. Etymology: < pro- + -pl- + -y (elements of protoplanetary adj.) + d- (in disc n.). Astronomy. An opaque disc of gas and dust orbiting a young star, thought to be an embryonic planetary system; a protoplanetary disc. ΚΠ 1992 United Press Internat. Newswire (Nexis) 17 Dec. The disks, dubbed Proplyds, are bright enough to have been seen from Earth-based telescopes. 1993 C. R. O'Dell et al. in Astrophysical Jrnl. 410 699/1 The key to each CS [sc. compact source] is its high-density neutral core, which is probably a protoplanetary disk (proplyd) overtaken by the advancing ionization of M42. 2001 C. A. Pickover Stars of Heaven vi. 92 The Orion proplyds are larger than the Sun's solar system and contain enough gas and dust to provide the raw material for future planetary systems. This is a new entry (OED Third Edition, June 2007; most recently modified version published online March 2022). < n.1992
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