cross-cap

(redirected from Cross cap)

cross-cap

[′krȯs ‚kap]
(mathematics)
The self-intersecting surface that results when a Möbius band is deformed so that its boundary is a circle.
References in periodicals archive ?
For his labors, Ian received a certificate of commendation, a Red Cross cap and Red Cross bank and a firefighter's red T-shirt and plastic helmet.
An indignant Scotsman is incensed that Harry sported a St George's Cross cap and an England shirt while watching England versus South Africa.
Approximately 120 of these first-aid and CPR trained workers, donning Red Cross caps and NYRR vests, will be "spotters" who support the activities of NYRR's medical professionals along the marathon route.