a. [ad. L. excurrent-em, pr. pple. of excurrĕre: see EXCUR.]
1. That runs out or forth. Of arterial blood: That flows from the heart.
1826. Kirby & Sp., Entomol., xxxii. (1828), III. 293. The excurrent (or arterial) stream took its course along the inner margin. Ibid., xxxix. IV. 92. In the excurrent part of its course.
1887. W. J. Sollas, in Encycl. Brit., XXII. 413/1 s.v. Sponges, The insoluble residue … is carried out through the oscule by the excurrent water.
† 2. Passing beyond bounds or limits; overflowing, superabundant (in quot. fig.). Obs. rare–1.
1605. Timme, Quersit., I. iv. 12. Restraining a matter excurrent, within bondes and limits.
3. Admitting of or affording an exit.
1854. Woodward, Mollusca (1856), 277. Fig. 185 … showing the relative extent of the liver and ovarium … e, excurrent orifice.
1887. W. J. Sollas, in Encycl. Brit., XXII. 414/2 s.v. Sponges, In higher forms of sponges the chambers cease to open abruptly into the excurrent canals.
4. Bot. a. (See quot. 1835.) b. Projecting beyond the tip or margin, as when the midrib of a leaf is continued beyond the apex.
a. 1835. Lindley, Introd. Bot. (1848), II. 362. Excurrent; in which the axis remains always in the centre, all the other parts being regularly disposed round it; as the stem of abies.
1880. Gray, Struct. Bot., iii. § 3. 49.
b. 1847. in Craig.
1870. Hooker, Stud. Flora, 375. Horned Pond-weed … Stamen 1 … connective excurrent.
1882. Gard. Chron., XVIII. 70. Excurrent at the apex.
