clavus

[kley-vuh s, klah-]

Psychiatry. an intense headache in which the pain is likened to one that would be produced by a sharp object driven into the skull.

(in ancient Rome) a vertical stripe or band of purple worn on the tunic by senators and equites.

Entomology. clavola.

Origin of clavus

1800–10; < Latin: literally, nail; akin to claudere to close

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

In mediæval times the cross in a circle was sometimes called the “clavus” .
Needlework As Art
Marian Alford
On his later map Clavus has made up for the want of names in an astonishing way.
In Northern Mists (Volume 2 of 2)
Fridtjof Nansen
I think this is attributing to Clavus rather too much original thought, of which his maps and text do not otherwise give evidence.
In Northern Mists (Volume 2 of 2)
Fridtjof Nansen
It is clavus when there is a strong pulsation, conveying the sensation of a nail piercing the part.
Cooley's Practical Receipts, Volume II
Arnold Cooley
The figures of D. clavus by Albertini and Schweinitz are excellent, as also the description.
The North American Slime-Moulds
Thomas H. (Thomas Huston) MacBride

clavus in Medicine

[klā′vəs, klä′-]

corn

A condition resulting from healing of a granuloma of the foot in yaws, in which a core falls out, leaving an erosion.