a receptacle, sheath, or cell enclosing an organ, part, or structure, in particular 膜;鞘,尤指 ■(Anatomy)the loose sheath enclosing the spinal cord (剖)(包裹脊索的)鞘 ■(Zoology)a cup-like or tubular structure containing a coral polyp (动)壳 ■(Botany)either of the lobes of an anther, each containing two pollen sacs (植)药室,药爿;囊;室;(苔藓植物的)孢蒴 ■(亦作 theca folliculi fəˈlɪkjʊlʌɪ)(Anatomy)the outer layer of cells of a Graafian follicle (剖)卵泡膜
派生 thecate adjective 语源
early 17th cent.: via Latin from Greek thēkē 'case'