Retinoid \Ret"i*noid\, a. [Gr. ??? resin + -oid.] Resinlike, or resinform; resembling a resin without being such.
Advanced Polymer Systems rose 5/8 to 9 1/4 after it said it signed a letter of agreement with Ortho Pharmaceutical Corp., a subsidiary of Johnson & Johnson, to develop topical retinoid products.