A hydroponic system that actively moves the nutrient solution. Hydroponic systems can be either active or passive. Active means that nutrient solutions will be moved, usually by a pump. Passive relies on a wick or the anchor of the growing media.
Merriam-Webster Online Dictionary
active (adjective)1.
characterized by rather than by contemplation or speculation - action an active life
2.
producing or involving action or movement
3.
a) of a verb form or voice asserting that the person or thing represented by the grammatical subject performs the action represented by the verb - hits in “he hits the ball” is active
b) expressing action as distinct from mere existence or state
4.
quick in physical movement - lively
5.
marked by vigorous - activity busy the stock market was active
6.
requiring vigorous action or exertion - active sports
7.
having practical operation or results - effective an active law
8.
a) disposed to action - energetic took an active interest
b) engaged in an action or activity - an active club member
c) of a volcano currently erupting or likely to erupt - compare dormant 2a extinct 1b
d) characterized by emission of large amounts of electromagnetic energy - an active galactic nucleus
9.
engaged in full-time service especially in the armed forces - active duty
10.
marked by present operation, transaction, movement, or use - an active account
11.
a) capable of or reacting reacting readily - acting active nitrogen active ingredients
b) tending to progress or to cause degeneration - active tuberculosis
c) of an electronic circuit element capable of controlling voltages or currents
d) (1) requiring the expenditure of energy - active calcium ion uptake
(2) functioning by the emission of radiant energy or sound - radar is an active sensor
12.
still eligible to win the pot in poker
13.
moving down the line visiting in the set - used of couples in contredanses or square dances
Merriam-Webster Online Thesaurus
active (adjective)1.
being in effective operation
SYNONYMS:
alive, functional, functioning, going, live, living, on, operating, operational, operative, running, workingRELATED WORDS:
effective, effectual; employable, operable, usable ( useable), viable, workable; performing, producing, productive, serving, useful, yielding; astir, bustling, busy, dynamic, flourishing, humming, roaring, thrivingNEAR ANTONYMS:
deactivated, decommissioned; ineffective, ineffectual, useless; inoperable, unusable, unworkable; arrested, asleep, dormant, fallow, idle, inert, latent, lifeless, nonproductive, quiescent, sleepy, stagnating, unproductive, vegetating2.
having much high-spirited energy and movement
SYNONYMS:
active, airy, animate, animated, bouncing, brisk, energetic, frisky, gay, jaunty, jazzy, kinetic, mettlesome, peppy, perky, pert, pizzazzy ( pizazzy), racy, snappy, spanking, sparky, spirited, sprightly, springy, vital, vivacious, zippyRELATED WORDS:
dapper, dashing, spiffy; agog, alert, awake, open-eyed, up, wide-awake; agile, nimble, spry; bright, buoyant, cheerful, chipper, chirpy, chirrupy, effervescent, sparkly, upbeat; eager, enthusiastic, keen; frolicsome, impish, pixieish, playful; boisterous, bubbly, ebullient, exuberant, high-spirited; high-strung, nervous, skittishNEAR ANTONYMS:
indolent, lazy, unambitious; inert, lethargic, sleepy, sluggish, tired, torpid, weary; apathetic, impassive, phlegmatic, stolid; boring, dull, irksome, tedious3.
involved in often constant activity
SYNONYMS:
active, assiduous, bustling, diligent, employed, engaged, hopping, industrious, laborious, occupied, sedulous, tied-up, workingRELATED WORDS:
knee-deep, swamped; animated, astir, buzzing, flourishing, happening, humming, lively, thriving, vibrant; absorbed, concentrating, engrossed, focused ( focussed), immersed, intent, preoccupied; alive, functional, functioning, going, living, operating, operational, operative, running; energetic, vigorous; hardworking; indefatigable, tireless, untiringNEAR ANTONYMS:
free; asleep, dormant, latent, lifeless, quiescent, sleepy; inert, passive; dead, dull, slow; inoperative, nonoperating
Active (Wiktionary)
English
Etymology
From Middle English actyf, from Old French actif, from Latin āctīv(us), from agere (“to do, to act”), ultimately from Proto-Indo-European *h₂éǵeti. By surface analysis, act + -ive.
Pronunciation
- IPA(key): /ˈæk.tɪv/
- Rhymes: -æktɪv
Adjective
active (comparative more active, superlative most active
... Read Morepotent, effective, dynamic, lively, stimulating
