the sun at a maximum of solar activity, occurring every 11 years.
solar activity, superimposed on an unchanging background.
- Active splint
active splint active splint n. See dynamic splint.
- Active transport
the movement of ions or molecules across a cellular membrane from a lower to a higher concentration, requiring the consumption of energy. Historical Examples Each inactive tape transport requires two amperes and the one active transport requires 10 amperes. Preliminary Specifications: Programmed Data Processor Model Three (PDP-3) Digital Equipment Corporation noun (biochem, physiol) a process […]
- Active vocabulary
noun the total number of words a person uses in his own speech and writing Compare passive vocabulary
- Active voice
active voice One of the two “voices” of verbs (see also passive voice). When the verb of a sentence is in the active voice, the subject is doing the acting, as in the sentence “Kevin hit the ball.” Kevin (the subject of the sentence) acts in relation to the ball. Contemporary Examples Hawa also supports […]