Sentence:  <WSD>Transflection</WSD> is an extension of the transmission technique, as shown in Figure 4.10. When a mirror is placed behind the sample, the light transmitted through the sample is reflected back through the sample and into the diffuse reflectance probe or integrating sphere. <WSD>Transflection</WSD> thus measures a combination of transmission and reflection. This technique is useful for emulsions, gels, and turbid liquids. 
Meaning of the word marked with <WSD> tags:  A type of spectroscopic measurement produced by transmitting light through a sample and reflecting it back through the sample onto a probe.