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

• discrepancy
• serpent
• serpent fern
• serpent star
• serpent-worship
• Serpentes
• serpentine
• serpiginous
• Serra
• serranid
• serranid fish
• Serranidae
• Serranus
• Serranus subligarius
• Serrasalmus
• serrate
• serrate leaf
• serrated
• serrated wrack
• Serratia
• Serratia marcescens
• serration
• Serratula
• Serratula tinctoria
• serratus