One of the needlelike or bristlelike spines or prickles of some animals and plants; also, a needlelike crystal.

Needle-shaped; slender like a needle or bristle, as some leaves or crystals; also, having sharp points like needless.

Alt. of Aciculated

Furnished with aciculae.

Acicular.

Marked with fine irregular streaks as if scratched by a needle.

Needle-shaped; acicular.

Needle ore.

Sour, sharp, or biting to the taste; tart; having the taste of vinegar: as, acid fruits or liquors. Also fig.: Sour-tempered.

Of or pertaining to an acid; as, acid reaction.

A sour substance.

One of a class of compounds, generally but not always distinguished by their sour taste, solubility in water, and reddening of vegetable blue or violet colors. They are also characterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losing their own peculiar properties. They all contain hydrogen, united with a more negative element or radical, either alone, or more generally with oxygen, and take their names from this negative element or radical. Those which contain no oxygen are sometimes called hydracids in distinction from the others which are called oxygen acids or oxacids.

Containing a high percentage of silica; -- opposed to basic.

Containing or yielding an acid.

Capable of being acidified, or converted into an acid.

Producing acidity; converting into an acid.

The act or process of acidifying, or changing into an acid.

A simple or compound principle, whose presence is necessary to produce acidity, as oxygen, chlorine, bromine, iodine, etc.

of Acidify

of Acidify

To make acid; to convert into an acid; as, to acidify sugar.

To sour; to imbitter.

An instrument for ascertaining the strength of acids.

The measurement of the strength of acids, especially by a chemical process based on the law of chemical combinations, or the fact that, to produce a complete reaction, a certain definite weight of reagent is required.

The quality of being sour; sourness; tartness; sharpness to the taste; as, the acidity of lemon juice.

Sourly; tartly.

Acidity; sourness.

of Acidulate

of Acidulate

To make sour or acid in a moderate degree; to sour somewhat.