What's the difference between straight and straightedge?

Straight

Definition:

(a.) A variant of Strait, a.
(superl.) Right, in a mathematical sense; passing from one point to another by the nearest course; direct; not deviating or crooked; as, a straight line or course; a straight piece of timber.
(superl.) Approximately straight; not much curved; as, straight ribs are such as pass from the base of a leaf to the apex, with a small curve.
(superl.) Composed of cards which constitute a regular sequence, as the ace, king, queen, jack, and ten-spot; as, a straight hand; a straight flush.
(superl.) Conforming to justice and rectitude; not deviating from truth or fairness; upright; as, straight dealing.
(superl.) Unmixed; undiluted; as, to take liquor straight.
(superl.) Making no exceptions or deviations in one's support of the organization and candidates of a political party; as, a straight Republican; a straight Democrat; also, containing the names of all the regularly nominated candidates of a party and no others; as, a straight ballot.
(adv.) In a straight manner; directly; rightly; forthwith; immediately; as, the arrow went straight to the mark.
(n.) A hand of five cards in consecutive order as to value; a sequence. When they are of one suit, it is calles straight flush.
(v. t.) To straighten.

Example Sentences:

(1) In contrast to L2 and L3 in L1 the mid gut runs down in a straight line without any looping.
(2) It was so difficult to keep a straight face when I was filming a sauna scene with Roy Barraclough, who played the mayor of Blackpool.
(3) The region of the tentorium and straight sinus can occasionally give rise to a vermiform appearance (the "AVM artifact").
(4) In testing the contribution of the long, curved stem to the torsional stability of uncemented prostheses by comparing it with other stems, the long, curved stem was the most stable, followed by a shorter straight stem, and a short, proximally curved stem.
(5) Every time I have seen him since – you stand up straight and it’s: ‘Hi, boss.
(6) Both sets of experiments revealed a straight linear relationship between the dose of VC and the % foci area induced.
(7) Despite a few initial concerns about the technology and how it would fit into their daily routines, staff really see the benefit and find it rewarding to see the messages and be able to respond straight away.
(8) The results may be due to stronger social reinstatement tendencies in females than in males: Higher levels of social motivation facilitate behavioral performance when the task is easy (straight runway) and inhibit it when the task is difficult (V-shaped runway).
(9) The contrast threshold for line orientation was studied using two lines with the same orientation under three different experimental conditions (series): (1) the two lines were presented in the same part of the receptive field; (2) they were along the same straight line and separated by 14' visual angle; (3) they were parallel and displaced at 4' of visual angle.
(10) Only eye position proved statistically significant; straight-ahead eye position induced more bias than did fixation of the visual stimulus.
(11) Ultrastructural examination of a tumor with a typical cribriform pattern showed spaces of two types; the more frequent type was bounded by cells with straight plasma membranes and contained filamentous and basement-membrane-like material, and the less frequent type was surrounded by cells with numerous microvilli and contained nonfilamentous homogeneous material.
(12) The first problem facing Calderdale is sheep-rustling Happy Valley – filmed around Hebden Bridge, with its beautiful stone houses straight off the pages of the Guardian’s Lets Move To – may be filled with rolling hills and verdant pastures, but the reality of rural issues are harsh.
(13) Atlético Madrid maintained their faint hopes of catching Barcelona by recording a fourth straight league win, comfortably beating Deportivo la Coruña 3-0 with goals by the midfielder Saúl Ñíguez, top scorer Antoine Griezmann and Argentinian forward Ángel Correa.
(14) The chemotactic receptor-transducer proteins of Escherichia coli are responsible for directing the swimming behavior of cells by signaling for either straight swimming or tumbling in response to chemostimuli.
(15) These observations suggest that the inner dynein arms in Chlamydomonas axonemes are aligned not in a single straight row, but in a staggered row or two discrete rows.
(16) Following a run which included eight straight draws in the Premier League and a 3-0 defeat at Tottenham last Wednesday, Mubarak had reached the conclusion that Hughes and his coaching staff were not realising the potential of the players City had assembled.
(17) When plotted against [Ca]o on a double log scale, the above relation yielded a straight line with a slope of 1.0.
(18) The torque versus rotation curves can be divided into two straight regions and two transition zones.
(19) Its middle, straight portion (between 2.30 and 3.30 microns sarcomere spacings) extrapolated to zero tension at 3.49 microns sarcomere length.
(20) New observations include: (1) In 15 nm cross sections that show single 14.5 nm levels: (a) The flared X structure characteristic of rigor is replaced by a straight-X figure in which the crossbridge density is aligned along the myosin-actin plane, rather than skewed across it as in rigor.

Straightedge

Definition:

(n.) A board, or piece of wood or metal, having one edge perfectly straight, -- used to ascertain whether a line is straight or a surface even, and for drawing straight lines.

Example Sentences: