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ultralow

ultralow

1 3.6
Very low in amount or level
  • adjective
  • /ˈʌltrəloʊ/
translation icon : ultrabajo
  • It also provides large-spot interfaces with ultralow reflectivity that allow it to be passively aligned when used in integrated optical subsystems.
  • ultralow rates
  • ultralow interest

Examples

  • Nevertheless, some specialists argue that ultralow fertility rates may be but a harbinger of future—and currently unimaginable—fertility declines.

    Academic text (2010)
  • At ultralow temperatures, the scattering length can be much larger (typically ten to a hundred times bigger) than the hard-core size of the atoms assumed in kinetic theory for room-temperature atoms.

    Academic text (1999)
  • LatheChuck: a useful discovery for me was ultralow-self-discharge NiMH cells.

    Blog text (12)
  • For ultralow scattering energies, the effect of the interatomic potential is equivalent to that of a hard sphere of radius a.

    Academic text (1999)
  • Automatic Targeting Attack Communicator, uses an ultralow frequency coded transmitter to order our submarines to launch ballistic missiles.

  • Not even the deepest reaches of space are this cold, or so shielded from magnetic fields as this chip, which is etched at a plant in Silicon Valley from a niobium alloy that becomes superconducting at ultralow temperatures.

    Blog text (21)
  • The instrument uses a high-performance double monochromator to achieve ultralow stray light (0.00005% or less at 340 nm) while maintaining up to a 0.1-nm resolution.

    Academic text (2006)
  • With ultralow interest rates, many people are able to buy homes for the first time.

  • Investors are taking advantage of ultralow yields on bonds to explore other opportunities.

  • Consumers are benefiting from ultralow prices during the holiday sales.

Synonyms

low
vsultralow
1.0

Not enough in amount or level

is much more extreme, describing amounts far below the usual level
minimal
vsultralow
196 3.3

Very small in amount or degree

is more extreme, applying to amounts far below that level
slim
vsultralow
87 2.0

Small in amount or number, not large

is far more extreme in smallness than that modest amount
low-level
vsultralow
33 3.8

Not very strong and present in small amounts

is more extreme, indicating amounts much smaller and rarer
subnormal
vsultralow
1 6.4

Lower than the normal level in amount or quality

is more extreme, indicating levels far below normal averages
miniscule
vsultralow
  • US
1 4.3

Very small and easy to miss

is even more extreme in smallness and degree
lowish
vsultralow
3.0

Slightly below the usual amount, level, or sound

is much more extreme, applying to very small amounts

Antonyms

1.0

More than usual in amount or strength

1 3.9

Raised above the surrounding ground or area

How Low

ultralow
1 3.6
negligible
31 5.6
minimal
196 3.3
low
1.0
small
1.0

Surface Forms

ultralow positive

Morphology

ultralow = low (transparent) = ultra + low

The adjective is a straightforward combination of the intensifying prefix 'ultra-' and 'low', so its meaning is easily recoverable from the parts.

Etymology

The word ultralow is made from the prefix ultra- and the common word low. The prefix ultra- means 'beyond' or 'extreme', as in ultraviolet, so ultralow means 'beyond low' or very, very low, which explains its use for amounts, temperatures, or emissions that are extremely small.