pīˈrēˌnȯid, ˈpīrəˌn- noun
( -s )
Etymology: International Scientific Vocabulary pyren- + -oid; probably originally formed in German
: one of the colorless highly refractive proteid bodies found within the chromatophores of various low organisms (as algae of the order Zygnematales) and serving as centers for the deposition of starch