Definition of porta- in English:

porta-

Pronunciation: /ˈpɔːtə/

combining form

Denoting something that is movable or portable, often used as part of a proprietary name: Portaloo Portakabin

Origin

from portable.

Definition of porta- in:

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Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up