of, at, or forming the base.
forming a basis; fundamental; basic.

indicating a standard low level of activity of an organism, as during total rest.
of an amount required to maintain this level.

Medicine/Medical. serving to induce a preliminary or light anesthesia prior to total anesthetization.
Historical Examples

Fig. 71 shows a combination of a hexagonal prism (m) with the basal pinacoid (c).
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 Various

Furthermore, morphology is in reality a basal consideration.
College Teaching Paul Klapper

(e.) Terminal or basal point, with the prehensile larval antenn, represented on rather too large a scale.
A Monograph on the Sub-class Cirripedia (Volume 1 of 2) Charles Darwin

Synthlipsis: the basal constriction of the notocephalon in Notonectids.
Explanation of Terms Used in Entomology John. B. Smith

Valves of equal breadth, much depressed, and longitudinally sulcated; the basal extremities approximating.
Zoological Illustrations, or Original Figures and Descriptions. Volume I, Second Series William Swainson

This letter stated with full sincerity Lincoln’s basal principle.
The Negro and the Nation George S. Merriam

On the basal area are waved black lines, separate on the hind wings, more or less blended on the fore wings.
The Butterfly Book William Jacob Holland

The basal for the rate of interest is the benefit or the advantage of the loan to the borrower.
Usury Calvin Elliott

These depending crests for the muscles are rather thin, but they extend over half the basal margin of the valve.
A Monograph on the Sub-class Cirripedia (Volume 2 of 2) Charles Darwin

The basal principles of Confucian ethics are the “five relations.”
The Gist of Japan R. B. Peery

at, of, or constituting a base
of or constituting a foundation or basis; fundamental; essential

“relating to a base,” 1828, from base (n.) + -al (1).

basal ba·sal (bā’səl, -zəl)

Of, relating to, located at, or forming a base, usually of an organ or a tooth.

Of, relating to, of situated at the lowest level, as of an organ.


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