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n. pl. lucidas
The brightest star in a constellation: Rigel is the lucida of the constellation Orion.

[New Latin (stēlla) lūcida : stēlla, star + lūcida, feminine of lūcidus, bright, clear, shining; see lucid.]
References in classic literature ?
Lubbock made drawings for me with the camera lucida of the jaws which I had dissected from the workers of the several sizes.
A 90-mm reflector at 50x will separate the 8th-magnitude secondary from the lucida without problems.
Tenders are invited for purchase of trinocular stereo microscope with camera lucida
Jet Leyco's 'Matangtubig (Town in a Lake)' won special mention in the AQCC-Camera Lucida award tilt of the recent 21st Fantasia International Film Festival in Montreal, Quebec, Canada.
Ese mismo ano se publica de manera postuma un ensayo, quizas una de las reflexiones mas influyentes sobre la experiencia fotografica, titulado La camara lucida (La chambre claire).
Isabel y Mario estuvieron cuatro dias en Filipinas y el escritor conto que habian visitado uno de los colegios a los que asistio Isabel Preysler antes de trasladarse a Espana siendo adolescente: <<Estuvimos en el centro, y aparecio una monjita que habia sido profesora de Isabel, y que estaba muy lucida.
J P Spencer 115 3 [2] 236-46 LUCIDA (IRE)11 J Bolger 4 9-10 K J Manning 116 4 [4] 529-41 SPEEDY BOARDING28 (D) J Fanshawe 4 9-10 .
lucida were explored, along with basic aspects of its reproductive biology (which has never been investigated).
Stablemate Lucida, who was placed in both the 1,000 Guineas and the Coronation Stakes, is on course for the Group 1 Coolmore Matron Stakes at Leopardstown the same evening.
Dubai: Godolphin launches a powerful two-pronged challenge in the Group 1 Falmouth Stakes at Newmarket on Friday, with Lucida and Fintry, in a bid to win the mile showpiece for the first time in its history.
Caption: The Jacky Teplitzky team at Douglas Elliman is listing apartment 17H at The Lucida on East 85th Street for $3,495,000.