a. Bot. [a. F. extrorse, f. L. extrors-us in an outward direction, f. extrā adv. (see EXTRA) + versus towards.] (See quots.).
1858. Gray, Bot. Text-bk., v. § 6. 282. When the anther looks away from the pistils and towards the petals … it is said to be extrorse, or turned outwards.
1870. Bentley, Bot., 239. The anther is said to be extrorse.
1882. Vines, Sachs’ Bot., 557. The anthers open inwards towards the gynæceum (introrse), or outwards (extrorse).
