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Webster 1913 Edition

Noun.

An instrument to show the time of day by means of the shadow of a gnomon, or style, on a plate.

Sundial shell

(Zool.)

any shell of the genus Solarium. See

sundial ‎(plural sundials)

A simple timekeeping device in which the shadow cast by a vertical pole or plate (the gnomon) is used to indicate the time of day.
- 1907, Robert W[illiam] Chambers, “chapter VIII”, in The Younger Set (Project Gutenberg; EBook #14852), New York, N.Y.: A. L. Burt Company, published 1 February 2005 (Project Gutenberg version), OCLC 4241346:
  
  Elbows almost touching they leaned at ease, idly reading the almost obliterated lines engraved there. ¶ "I never understood it," she observed, lightly scornful. "What occult meaning has a sun-dial for the spooney? I'm sure I don't want to read riddles in a strange gentleman's optics."

simple timekeeping device which makes use of sunlight

Khmer: នាឡិកាព្រះអាទិត្យ ‎(niele’kaa preah aatɨt)
Korean: 해시계 ‎(haesigye)
Latin: sōlārium (la) n
Macedonian: сончев часовник m ‎(sončev časovnik)
Malayalam:
Norwegian:

Bokmål: solur n

Nynorsk: solur n
Occitan:
Old English: sōlmerca m
Oriya:
Persian: ساعت آفتابی (fa) ‎(sâ'at-e âftâbi)
Polish: zegar słoneczny (pl) m
Portuguese: relógio de sol (pt) m, relógio do sol m, relógio solar (pt) m, solário (pt) m
Russian: со́лнечные часы́ (ru) m pl ‎(sólnečnyje časý)
Serbo-Croatian: sunčanik (sh) m
Slovak: slnečné hodiny f pl
Slovene: sónčna úra (sl) f
Spanish: reloj solar m, reloj de sol m
Swedish: solur n
Tamil:
Telugu: నీడగడియారము ‎(nīḍagaḍiyāramu), సూర్యఘంట ‎(sūryaghaṃṭa)
Thai: นาฬิกาแดด
Turkish: güneş saati (tr)
Ukrainian: со́нячний годи́нник m ‎(sónjačnyj hodýnnyk)
Vietnamese: đồng hồ mặt trời
Volapük: solaglok
Walloon: