翼鏡: speculum

to use / to employ / to make use of, to apply / to spend

observation

observe

(ornithology) speculum

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

(archaic) the portion of a feather where the quill attaches to the skin / a feather, down, plume / a wing (as of a bird, bat, insect, or airplane) / a fletching on an arrow / a shuttlecock

a bird / a chicken / fowl or chicken meat