neuter accusative singular of cakkhuviññāṇa (a noun formed by tatpuruṣa compound)
Analysis. cakkhu (eye) + viññāṇa (consciousness). Cakkhu is the organ of sight; viññāṇa is the knowing that arises dependent on that sense faculty and its object (form). In doctrinal usage, cakkhuviññāṇa is one of the six consciousnesses (aṅga-viññāṇa), each bound to a sense door (āyatana), and is the bare registration of color and shape before conceptual elaboration.
Etymology. Cakkhu derives from Proto-Indic *cakṣu- (Sanskrit cakṣu "eye"), cognate with English dialectal "cake" (the round shape) and Greek kýklos "circle" (the round iris). Viññāṇa is from vi- (apart) + √jñā (know), meaning "knowledge that separates" or "discriminating awareness"—compare Sanskrit vijñāna.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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