pac-e tâs, tekke-ye ~
Fr.: zone chauve
The location on the surface of the → Sun where → coronal → magnetic field lines become tangent to the → photosphere. Bald patches play an important role in solar → magnetohydrodynamics.
→ bald, such called because of visual reference to a haircut (Titov et al. 1993, A&A 276, 564); → patch.
pac-e izobirâh, teke-ye ~
Fr.: tache isoplanatique
The spatial region where the variation of the → point spread function of an imaging system is considered negligible.
→ isoplanatic; → patch.
1) A small piece of material used to mend a tear or break, to cover a hole,
or to strengthen a weak place.
M.E. pacche; of uncertain origin.
Pac, from Bašgaridi (Giroft) pac "patch; fragment," probably from *parka-, from *par- "piece" + diminutive/relation suffix -ka; cf. pÃ¢rÃ© "piece, part, portion;" parrÃ© "portion, segment (of an orange);" pargÃ¢lÃ© "piece, portion; patch;" KermÃ¢ni parikÃ© "portion, half;" Tabari perik "minute quantity, particle;" LÃ¢restÃ¢ni pakva "patch;" Borujerdi parru "patch;" (Fin Bandar AbbÃ¢s) park "patch;" (TÃ¢ti) pajina "patch, darn;" → part.
âšubnâki-te paci, ~ tekke-tekké
Fr.: turbulence parcellaire
A → turbulence that is not continuous in space, but is separated by regions of stability and → laminar flow.
Patchy adj. of → patch; → turbulence.