1. Having a form maintained by a rigid internal structure as well as by internal gas pressure 
2. Not fully rigid

See also: inflexible, rigid

• Silene dioica
• Silene latifolia
• Silene uniflora
• Silene virginica
• Silene vulgaris
• silent
• silent butler
• silent movie
• silent partner
• silent person
• silent picture
• silent treatment
• silently
• silents
• silenus
• silesia
• silex
• silhouette
• silica
• silica gel
• silicate
• siliceous
• silicic
• silicic acid
• silicide