دیکشنری
دیکشنری
acetylene
A colorless gas, that when mixed
with oxygen, burns at a temperature of about
3500・・C; used in welding.
acetylene torch
A metal-cutting and welding
instrument that operates on compressed acetylene
(a colorless hydrocarbon) and oxygen.
achene
In botanical terms, a small, dry, onecelled,
one-seeded, indehiscent fruit. In technical
terms, it does not include those fruits with
specialized features such as a samara, caryopsis,
nut
, or utricle.
achlamydeous
A flower without a perianth
(outside envelope,
calyx, corolla).
achromatic color
White light; a color that
does not elicit hue.
ACI
Abbreviation for American Concrete
Institute.
acicular
In botanical terms, needle-shaped.
acid 1.
In reference to soil, this indicates a pH
below 7.0 (neutral). 2. A chemical substance
capable of releasing excess protons (hydrogen
ions).
acid copper chromate (ACC)
A waterborne
salt preservative for wood. Wood must be
pressure treated for this preservative to be effective.
It is highly recommended by experts as it is
odorless, clean, does not leach, and its color can
be masked easily when dry by painting or applying
a solid color stain. This stain is not only good
for preserving wood above grade, but can also be
used for preservation of wood to be placed
underground.
acid etched
A reference to a metallic surface,
glass, or concrete that has been treated in an
acid bath to provide a rough surface or to
remove a portion of its surface.
acidic 1.
Soil or water with a pH less than 7.0.
Some only consider acidic to be 6.6 or less.
2.
Igneous rocks containing more than 65%
silica.
acidity
The measure of a substance’s pH below
neutral (7.0).
acid rain
Any rain that contains sulfur dioxide.
acid soil
Soil
having an acid reaction. It is usually
in reference to a soil having a pH value of
less than 6.6, but is technically applicable to any
value lower than 7.0, which is neutral. These
soils are common in areas of high rainfall. The
most common cure for highly acidic soils is the
addition of lime.
acisculis
An old term for a small mason’s pick,
with a flat face and pointed peen.
ACM
Abbreviation for asbestos-containing
material. Any material with over 1% asbestos
content.
AC pipe
Asbestos-cement pipe that was commonly
used for buried pipelines. It combines
strength with light weight and is immune to rust
and corrosion. It is no longer made because of
the health hazards associated with asbestos.
acquiescence 1.
An act of concurrence by
adjoining property owners that resolves a
boundary dispute or establishes a common
boundary, where the definite or more accurate
position of same has not or cannot be defined by
survey. 2. The tacit consent of one owner, by
not making a formal objection, to what might
be an encroachment by an adjoining property
owner over a questionable boundary.
acre
English or U.S. measurement of area equal
to 4840 sq yd; 43,560 sq ft; 0.405 hectare;
4046.85 sq m.
acre-foot 1.
A reference to a quantity of water
required to cover one acre to a depth of one foot.
Have a nice one
