- perish the thought,
Origin of perisarc
Examples from the Web for perisarc
It flattens itself out into a disc-like form, becomes divided into four lobes, and covered by a cuticle (perisarc).
The genera are based upon these differences in the perisarc.The Sea-beach at Ebb-tide|Augusta Foote Arnold
Over the whole exterior a delicate pellicle—the future perisarc—now becomes secreted.