1. Network of blood vessels, nerves or fibres.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• pleges,
• alexus,
• plexes,
• plexi,
• pleces,
• lexas,
• lexues,
• plexis,
• pleacs,
• lexus,
• plexs,
• flexuos,
• plepus,
• lepus,
• nexus,
• phebus,
• olexus,
• llexus,
• 0lexus,
• pkexus

• bollockses,
• PLEXES,
• plexus-the,
• blockhouses,
• bollixes,
• belkeziz,
• belkziz,
• bolixes,
• plus sign,
• Stroma-plexus,
• ballockses,
• bolloxes,
• Nerve-plexus,
• poleaxes,
• ploceus,
• BLKSIZE,
• pillowcases.

The adjective form of the word "plexus" is "plexal".