lacuna

Definition

A small opening; a small pit or depression, especially in bone.

Etymology

Learned borrowing from Latin lacūna (“a ditch, pit; a hollow, cavity; a gap, defect”). Doublet of lacune and lagoon.

Example Sentences

• ""Our young friend makes up for many obvious mental lacunæ by some measure of primitive common sense," remarked Challenger."
• "Long lacunae in this inscription make interpretation difficult."
• "For Beatrice Nutter, there will always be conspicuous lacunae in our mutual understanding, but after almost 30 years here, the anomalies now delight rather than confound her."