manu dhatu
Eighteen dhatus (Skt. aṣṭadaśa dhātu; Tib. ཁམས་བཅོ་བརྒྱད་, kham chobgyé, Wyl. khams bco brgyad) — a classification of all knowable things into eighteen 'elements'.
the six sense objects (Skt. viṣayadhātu; Tib. དམིགས་ཡུལ་གྱི་ཁམས་, Wyl. dmigs yul gyi khams):
visible forms (Skt. rūpa-dhātu)
sounds (Skt. śabda-dhātu)
smells (Skt. gandha-dhātu)
tastes (Skt. rasa-dhātu)
textures (Skt. spraṣṭavya-dhātu)
mental objects (Skt. dharma dhātu)
six sense faculties (Skt. indriyadhātu; Tib. དབང་པོའི་ཁམས་, Wyl. dbang po'i khams):
eye faculty (Skt. cakṣur-dhātu)
ear faculty (Skt. śrotra-dhātu)
nose faculty (Skt. ghrāṇa-dhātu)
tongue faculty (Skt. jihva-dhātu)
body faculty (Skt. kāya-dhātu)
mental faculty (Skt. mano-dhātu)
the six sense consciousnesses (Skt. vijñānadhātu; Tib. རྣམ་ཤེས་ཀྱི་ཁམས་, Wyl. rnam shes kyi khams)
eye-consciousness (Skt. cakṣur-vijñanadhātu)
ear-consciousness (Skt. śrotra-vijñanadhātu)
nose-consciousness (Skt. ghrāṇa-vijñanadhātu)
tongue-consciousness (Skt. jihva-vijñanadhātu)
body-consciousness (Skt. kāya-vijñanadhātu)
mind-consciousness (Skt. mano-vijñanadhātu)
According to Abhidharma, the eighteen dhatus are categorized differently, i.e. in relation to the five skandhas.