Of, or pertaining to, spectres; ghostly. / Of, or pertaining to, spectra; classified according to frequency or wavelength (of light etc)

(informal) A person who is very fond of computers.

(countable) The fragrant flower of a tropical tree (Cananga odorata) native to southeast Asia. / (uncountable) An essential oil derived from this flower used in aromatherapy and perfumes.

Resembling or characteristic of barley.