Words, grammatical forms and meanings linked to the ontology.
SPAD en · NOUN
Pronunciation
/ˈspæd/ (UK)
Meanings
(UK) An instance of a signal passed at danger.
"We found there had been 60 SPADs in the Paddington throat in the previous eight years, and that was all to do with the layout becoming more complex because of the Heathrow Express. 2026 March 4, Christian Wolmar, “Railtrack: what really happened”, in RAIL, number 1056, page 53:
(UK, alt-of, alternative, informal) Alternative form of spad (“special advisor in government”).
(qualifier:plant science) A relative measurement of the amount of chlorophyll present in a leaf, based on measurements with a SPAD meter produced by Minolta.
(abbreviation, alt-of, initialism) Initialism of self-propelled air defense; a self-propelled anti-aircraft vehicle.
Signal awareness aids were present at SPADed signals 2016 December 5, John R. Wilson, Beverley Norris, Ann Mills, People and Rail Systems: Human Factors at the Heart of the Railway, CRC Press, →ISBN:
SPADing is best seen as a systemic problem requiring a systemic solution 2005, Andrew Hopkins, Safety, Culture and Risk: The Organisational Causes of Disasters:
SN109 should be known to all drivers driving out of Paddington as a multi SPADed signal 2006 July 7, Karen Clarke, Gillian Hardstone, Mark Rouncefield, Ian Sommerville, Trust in Technology: A Socio-Technical Perspective, Springer Science & Business Media, →ISBN, page 138: