Perspicacious vs. Perspicuous — What's the Difference?

Having a ready insight into and understanding of things

Clearly expressed or presented; easy to understand

Having or showing penetrating mental discernment; clear-sighted.

Expressing oneself clearly and effectively

(figuratively) Of acute discernment; having keen insight; mentally perceptive.

Discerning; perspicacious.

(obsolete) Able to physically see clearly; quick-sighted; sharp-sighted.

Clearly expressed, easy to understand; lucid.

Having the power of seeing clearly; quick-sighted; sharp of sight.

(logic) (Of a language or notation) the process of inference from premises to conclusion is explicitly laid out.

Fig.: Of acute discernment; keen.

(rare) Transparent; translucent.

Acutely insightful and wise;

Capable of being through; transparent; translucent; not opaque.

Mentally acute or penetratingly discerning;

Clear to the understanding; capable of being clearly understood; clear in thought or in expression; not obscure or ambiguous; as, a perspicuous writer; perspicuous statements.

(of language) transparently clear; easily understandable;